Prof Michael Hedley staff profile picture

Contact details +64 (06) 356 9099  ext. 84797

Prof Michael Hedley PhD

Professor in Soil Science

Institute of Agriculture and Environment

Twenty eight years experience in research and teaching at the tertiary level, specialising in: soil-plant phosphate interactions; phosphate, sulphur and trace element fertiliser development and evaluation; soil and plant analysis; soil fertility and fertiliser recommendations, nutrient cycling in grazed pasture systems, nutrient budgeting and the development of educational short courses. I have worked directly on soil fertility problems in Canada, UK, Philippines, Ecuador and New Zealand and indirectly through supervised PhD students conducting research on estate crop and field crop projects in Sri Lanka, Indonesia and Myanmar.


Roles and Responsibilities

Professor and Group Leader Soil and Earth Sciences,

Director of the Fertiliser and Lime Research Centre in the Institute of Natural Resources, Massey University

Specialises in soil-plant phosphate interactions; phosphate, sulphur and trace element fertiliser development and evaluation; soil and plant analysis; soil fertility and fertiliser recommendations, nutrient cycling in grazed pasture systems, nutrient budgeting and the development of educational short courses.

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Professional

Contact details

  • Location: 133, AgHort B
    Campus: Manawatu

Qualifications

  • B.Sc. Biochemistry - Leeds University (1974)
  • PhD Soil Science - Massey University (1978)

Research Expertise

Research Interests

Biogeochemical cycles in grazed pasture systems including detailed work on impact of farming systems on the soil carbon, nitrogen potassium and phosphate cycles.

Management strategies to reduce N, P and faecal microbe loss in drainage and runoff from dairy farms

Research Opportunities

  • Low Footprint Dairy Systems  (2013 onwards) Novel farm systems are being trial to reduce itrogen, phosphorus and faecal coliform losses from dairy pastures to waters

Thematics

Future Food Systems

Area of Expertise

Field of research codes
Agricultural And Veterinary Sciences (070000): Agriculture, Land and Farm Management (070100):
Carbon Sequestration Science (050301): Environmental Sciences (050000):
Farming Systems Research (070107):
Soil Sciences (050300): Soil Sciences not elsewhere classified (050399)

Keywords

Mike has extensive research experience in biogeochemical cycles in grazed pasture systems including detailed work on impact of farming systems on the soil carbon, nitrogen potassium and phosphate cycles. He has led the development of the professional development courses in Sustainable Nutrient Management and the Science of climate change.

Research Projects

Summary of Research Projects

Position Current Completed
Not Specified 0 1
Project Leader 6 19
Team Member 0 2

Completed Projects

Project Title: Soil carbon sink enhancement

A research team from the NZBRC-Massey University (Prof. Hedley and A/Prof Camps) Plant and Food Research (Dr. Deurer) and Landcare Research¿s Global Change Processes team (Prof. Saggar) is undertaking research that aims to increase the stocks of stabilised soil carbon in pasture soils as a greenhouse gas mitigation strategy. Approximately 50% of soil carbon in New Zealand is under grazed pasture management. If full carbon accounting becomes part of future commitments to international climate change mitigation protocols, then land management techniques that can be applied to increase soil carbon stocks under grazed pastures must be developed, verified and their wider benefits and costs assessed. To achieve increasing soil carbon stocks will require that more of the plant-derived carbon entering soils is transformed into soil carbon sinks of greater permanence than those occupied by the majority of current topsoil carbon. Greater permanence of soil carbon is not achieved by modifying the chemical nature of plant carbon entering the soil. Greater permanence is only achieved when new carbon is stabilised through organo-mineral complexation, or is converted to highly aromatic carbon such as biochar, or, when its decomposition is limited by soil physical or biological conditions.
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Date Range: 2010 - 2014

Funding Body: Foundation for Research, Science & Technology

Project Team:

Research Outputs

Journal

Rivas, A., Singh, R., Horne, D., Roygard, J., Matthews, A., & Hedley, MJ. (2017). Denitrification potential in the subsurface environment in the Manawatu River catchment, New Zealand: Indications from oxidation-reduction conditions, hydrogeological factors, and implications for nutrient management. Journal of Environmental Management. 197, 476-489
[Journal article]Authored by: Hedley, M., Singh, R.
Hanly, JA., Hedley, MJ., & Horne, DJ. (2017). Effects of summer turnip forage cropping and pasture renewal on nitrogen and phosphorus losses in dairy farm drainage waters: A three-year field study. Agricultural Water Management. 181, 10-17
[Journal article]Authored by: Hanly, J., Hedley, M., Horne, D.
Shen, Q., Hedley, M., Arbestain, MC., & Kirschbaum, MUF. (2017). Tephra is an effective P diffusion barrier in root exclusion experiments. Plant and Soil. 410(1-2), 51-61
[Journal article]Authored by: Camps Arbestain, M., Hedley, M., Shen, Q.
Hendricks, S., Donaghy, D., Matthew, C., Bretherton, M., Sneddon, N., Cosgrove, G., . . . Hedley, M. (2016). Dry matter yield, nutritive value and tiller density of tall fescue and perennial ryegrass swards under grazing. Journal of New Zealand Grasslands. 78, 149-156
[Journal article]Authored by: Bretherton, M., Christensen, C., Donaghy, D., Hedley, M., Matthew, C.
Shen, Q., Hedley, M., Camps Arbestain, M., & Kirschbaum, MUF. (2016). Can biochar increase the bioavailability of phosphorus?. Journal of Soil Science and Plant Nutrition. 16(2), 268-286
[Journal article]Authored by: Camps Arbestain, M., Hedley, M., Shen, Q.
Chrystal, JM., Smith, LC., Monaghan, RM., Hedley, M., & Horne, D. (2016). Effects of applying dairy wintering barn manure of differing C:N ratios directly to pasture on N mineralisation and forage growth. New Zealand Journal of Agricultural Research. 59(3), 324-331
[Journal article]Authored by: Hedley, M., Horne, D.
Shen, Q., Kirschbaum, MUF., Hedley, MJ., & Arbestain, MC. (2016). Testing an alternative method for estimating the length of fungal hyphae using photomicrography and image processing. PLoS ONE. 11(6)
[Journal article]Authored by: Camps Arbestain, M., Hedley, M., Shen, Q.
Stafford, AD., Anderson, CWN., Hedley, MJ., & McDowell, RW. (2016). Cadmium accumulation by forage species used in New Zealand livestock grazing systems. Geoderma Regional. 7(1), 11-18
[Journal article]Authored by: Anderson, C., Hedley, M.
Calvelo Pereira, R., Hedley, M., Camps Arbestain, M., Wisnubroto, E., Green, S., Saggar, S., . . . Mahmud, AF. (2016). Net changes of soil C stocks in two grassland soils 26 months after simulated pasture renovation including biochar addition. GCB Bioenergy. 8(3), 600-615
[Journal article]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M., Saggar, S.
Herath, HMSK., Camps-Arbestain, M., Hedley, MJ., Kirschbaum, MUF., Wang, T., & van Hale, R. (2015). Experimental evidence for sequestering C with biochar by avoidance of CO<inf>2</inf> emissions from original feedstock and protection of native soil organic matter. GCB Bioenergy. 7(3), 512-526
[Journal article]Authored by: Camps Arbestain, M., Hedley, M.
Hina, K., Hedley, M., Camps-Arbestain, M., & Hanly, J. (2015). Comparison of Pine Bark, Biochar and Zeolite as Sorbents for NH4+-N Removal from Water. Clean - Soil, Air, Water. 43(1), 86-91
[Journal article]Authored by: Camps Arbestain, M., Hanly, J., Hedley, M.
Kusumo, BH., Arbestain, MC., Mahmud, AF., Hedley, MJ., Hedley, CB., Pereira, RC., . . . Singh, BP. (2014). Assessing biochar stability indices using near infrared spectroscopy. Journal of Near Infrared Spectroscopy. 22(5), 313-328
[Journal article]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M.
Calvelo Pereira, R., Muetzel, S., Camps Arbestain, M., Bishop, P., Hina, K., & Hedley, M. (2014). Assessment of the influence of biochar on rumen and silage fermentation: A laboratory-scale experiment. Animal Feed Science and Technology. 196, 22-31
[Journal article]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M.
Wang, T., Camps-Arbestain, M., Hedley, M., Singh, BP., Calvelo-Pereira, R., & Wang, C. (2014). Determination of carbonate-C in biochars. Soil Research. 52(5), 495-504
[Journal article]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M.
Herath, HMSK., Camps-Arbestain, M., Hedley, M., Van Hale, R., & Kaal, J. (2014). Fate of biochar in chemically- and physically-defined soil organic carbon pools. Organic Geochemistry. 73, 35-46
[Journal article]Authored by: Camps Arbestain, M., Hedley, M.
Wang, T., Camps-Arbestain, M., & Hedley, M. (2014). The fate of phosphorus of ash-rich biochars in a soil-plant system. Plant and Soil. 375(1-2), 61-74
[Journal article]Authored by: Camps Arbestain, M., Hedley, M.
Beukes, P., Romera, A., Clark, D., Dalley, D., Hedley, M., Horne, D., . . . Laurenson, S. (2013). Evaluating the benefits of standing cows off pasture to avoid soil pugging damage in two dairy farming regions of New Zealand. New Zealand Journal of Agricultural Research. 56(3), 224-238
[Journal article]Authored by: Hedley, M., Horne, D.
Wang, T., Camps-Arbestain, M., & Hedley, M. (2013). Predicting C aromaticity of biochars based on their elemental composition. Organic Geochemistry. 62, 1-6
[Journal article]Authored by: Camps Arbestain, M., Hedley, M.
Herath, HMSK., Camps-Arbestain, M., & Hedley, M. (2013). Effect of biochar on soil physical properties in two contrasting soils: An Alfisol and an Andisol. Geoderma. 209-210, 188-197
[Journal article]Authored by: Camps Arbestain, M., Hedley, M.
Sanches, ID., Tuohy, MP., Hedley, MJ., & Mackay, AD. (2013). Seasonal prediction of in situ pasture macronutrients in New Zealand pastoral systems using hyperspectral data. International Journal of Remote Sensing. 34(1), 276-302
[Journal article]Authored by: Hedley, M., Tuohy, M.
Wang, T., Camps Arbestain, M., Hedley, M., & Bishop, P. (2012). Chemical and bioassay characterisation of nitrogen availability in biochar produced from dairy manure and biosolids. Organic Geochemistry. 51, 45-54
[Journal article]Authored by: Camps Arbestain, M., Hedley, M.
Pullanagari, RR., Yule, IJ., Tuohy, MP., Hedley, MJ., Dynes, RA., & King, WM. (2013). Proximal sensing of the seasonal variability of pasture nutritive value using multispectral radiometry. Grass and Forage Science. 68(1), 110-119
[Journal article]Authored by: Hedley, M., Pullanagari, R., Tuohy, M., Yule, I.
Pullanagari, RR., Yule, IJ., Tuohy, MP., Hedley, MJ., Dynes, RA., & King, WM. (2012). In-field hyperspectral proximal sensing for estimating quality parameters of mixed pasture. Precision Agriculture. 13(3), 351-369
[Journal article]Authored by: Hedley, M., Tuohy, M., Yule, I.
Pullanagari, RR., Yule, IJ., Hedley, MJ., Tuohy, MP., Dynes, RA., & King, WM. (2012). Multi-spectral radiometry to estimate pasture quality components. Precision Agriculture. 13(4), 442-456
[Journal article]Authored by: Hedley, M., Pullanagari, R., Tuohy, M., Yule, I.
Wang, T., Camps-Arbestain, M., Hedley, M., & Bishop, P. (2012). Predicting phosphorus bioavailability from high-ash biochars. Plant and Soil. 357(1), 173-187
[Journal article]Authored by: Camps Arbestain, M., Hedley, M.
Pullanagari, RR., Yule, IJ., Tuohy, MP., Hedley, MJ., Dynes, RA., & King, WM. (2011). In-field hyperspectral proximal sensing for estimating quality parameters of mixed pasture. Precision Agriculture. , 1-19
[Journal article]Authored by: Hedley, M., Pullanagari, R., Tuohy, M., Yule, I.
Christianson, LE., Hanly, JA., & Hedley, MJ. (2011). Optimized denitrification bioreactor treatment through simulated drainage containment. Agricultural Water Management. 99(1), 85-92
[Journal article]Authored by: Hanly, J., Hedley, M.
Calvelo Pereira, R., Kaal, J., Camps Arbestain, M., Pardo Lorenzo, R., Aitkenhead, W., Hedley, M., . . . Maciá-Agulló, JA. (2011). Contribution to characterisation of biochar to estimate the labile fraction of carbon. Organic Geochemistry. 42(11), 1331-1342
[Journal article]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M.
Schon, NL., Mackay, AD., Hedley, MJ., & Minor, MA. (2012). The soil invertebrate contribution to nitrogen mineralisation differs between soils under organic and conventional dairy management. Biology and Fertility of Soils. 48(1), 31-42
[Journal article]Authored by: Hedley, M., Minor, M.
Schon, NL., MacKay, AD., Hedley, MJ., & Minor, MA. (2011). Influence of soil faunal communities on nitrogen dynamics in legume-based mesocosms. Soil Research. 49(2), 190-201
[Journal article]Authored by: Hedley, M., Minor, M.
Kusumo, BH., Hedley, MJ., Hedley, CB., & Tuohy, MP. (2011). Measuring carbon dynamics in field soils using soil spectral reflectance: Prediction of maize root density, soil organic carbon and nitrogen content. Plant and Soil. 338(1), 233-245
[Journal article]Authored by: Hedley, M., Tuohy, M.
Houlbrooke, D., Hanly, J., Monaghan, R., Muirhead, R., Hedley, M., & Horneb, D. (2010). Letter to the editor. New Zealand Journal of Agricultural Research. 53(4), 407-409
[Journal article]Authored by: Hanly, J., Hedley, M.
Bretherton, MR., Scotter, DR., Horne, DJ., & Hedley, MJ. (2010). Towards an improved understanding of the soil water balance of sloping land under pasture. New Zealand Journal of Agricultural Research. 53(2), 175-185
[Journal article]Authored by: Bretherton, M., Hedley, M., Horne, D.
Hina, K., Bishop, P., Arbestain, MC., Calvelo-Pereira, R., MacIá-Agulló, JA., Hindmarsh, J., . . . Hedley, MJ. (2010). Producing biochars with enhanced surface activity through alkaline pretreatment of feedstocks. Australian Journal of Soil Research. 48(6-7), 606-617
[Journal article]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hanly, J., Hedley, M., Hindmarsh, J.
Free, HF., McGill, CR., & Hedley, MJ. (2010). The effect of biochars on maize (Zea mays) germination. New Zealand Journal of Agricultural Research. 53(1), 1-4
[Journal article]Authored by: Hedley, M., McGill, C.
Kusumo, BH., Hedley, MJ., Hedley, CB., Arnold, GC., & Tuohy, MP. (2010). Predicting pasture root density from soil spectral reflectance: Field measurement. European Journal of Soil Science. 61(1), 1-13
[Journal article]Authored by: Hedley, M., Tuohy, M.
Aye, TM., Hedley, MJ., Loganathan, P., Lefroy, RDB., & Bolan, NS. (2009). Effect of organic and inorganic phosphate fertilizers and their combination on maize yield and phosphorus availability in a Yellow Earth in Myanmar. Nutrient Cycling in Agroecosystems. 83(2), 111-123
[Journal article]Authored by: Hedley, M.
Sanches, ID., Tuohy, MP., Hedley, MJ., & Bretherton, MR. (2009). Large, durable and low-cost reflectance standard for field remote sensing applications. International Journal of Remote Sensing. 30(9), 2309-2319
[Journal article]Authored by: Bretherton, M., Hedley, M., Tuohy, M.
Hedley, CB., Kusumo, BH., Hedley, MJ., Tuohy, MP., & Hawke, M. (2009). Soil C and N sequestration and fertility development under land recently converted from plantation forest to pastoral farming. New Zealand Journal of Agricultural Research. 52(4), 443-453
[Journal article]Authored by: Hedley, M., Tuohy, M.
Kusumo, BH., Hedley, MJ., Hedley, CB., Hueni, A., Arnold, GC., & Tuohy, MP. (2009). The use of Vis-NIR spectral reflectance for determining root density: Evaluation of ryegrass roots in a glasshouse trial. European Journal of Soil Science. 60(1), 22-32
[Journal article]Authored by: Hedley, M., Tuohy, M.
Rowarth, JS., Camps Arbestain, M., Jones, JR., & Hedley, MJ. (2009). Biochar-the New Zealand potential. Primary Industry Management. 13(4), 16-18
[Journal article]Authored by: Camps Arbestain, M., Hedley, M., Jones, J.
Hedley, MJ. (2008). Chapter 14 Techniques for assessing nutrient bioavailability in soils: Current and future issues. Developments in Soil Science. 32(C), 283-327
[Journal article]Authored by: Hedley, M.
Hanly, JA., Hedley, MJ., & Horne, DJ. (2008). Evaluation of tephra for removing phosphorus from dairy farm drainage waters. Australian Journal of Soil Research. 46(6-7), 542-551
[Journal article]Authored by: Hanly, J., Hedley, M., Horne, D.
Grace, ND., Loganathan, P., & Hedley, MJ. (2008). The effect of age on the fluoride concentration in the metacarpus of grazing sheep in New Zealand. New Zealand Veterinary Journal. 56(3), 115-119
[Journal article]Authored by: Hedley, M.
Schon, NL., Mackay, AD., Minor, MA., Yeates, GW., & Hedley, MJ. (2008). Soil fauna in grazed New Zealand hill country pastures at two management intensities. Applied Soil Ecology. 40(2), 218-228
[Journal article]Authored by: Hedley, M., Minor, M.
Houlbrooke, DJ., Horne, DJ., Hedley, MJ., Snow, VO., & Hanly, JA. (2008). Land application of farm dairy effluent to a mole and pipe drained soil: Implications for nutrient enrichment of winter-spring drainage. Australian Journal of Soil Research. 46(1), 45-52
[Journal article]Authored by: Hanly, J., Hedley, M., Horne, D.
Loganathan, P., Hedley, MJ., & Grace, ND. (2008). Pasture soils contaminated with fertilizer-derived cadmium and fluorine: Livestock effects. Reviews of Environmental Contamination and Toxicology. 192, 29-66
[Journal article]Authored by: Hedley, M.
Liu, Q., Loganathan, P., Hedley, MJ., & Grace, LJ. (2008). Effect of mycorrhizal inoculation on rhizosphere properties, phosphorus uptake and growth of pine seedlings treated with and without a phosphate rock fertilizer. Journal of Plant Nutrition. 31(1), 137-156
[Journal article]Authored by: Hedley, M.
Collins, R., McLeod, M., Hedley, M., Donnison, A., Close, M., Hanly, J., . . . Matthews, L. (2007). Best management practices to mitigate faecal contamination by livestock of New Zealand waters. New Zealand Journal of Agricultural Research. 50(2), 267-278
[Journal article]Authored by: Hanly, J., Hedley, M., Horne, D.
Bhandral, R., Bolan, NS., Saggar, S., & Hedley, MJ. (2007). Nitrogen transformation and nitrous oxide emissions from various types of farm effluents. Nutrient Cycling in Agroecosystems. 79(2), 193-208
[Journal article]Authored by: Hedley, M., Saggar, S.
Bhandral, R., Saggar, S., Bolan, NS., & Hedley, MJ. (2007). Transformation of nitrogen and nitrous oxide emission from grassland soils as affected by compaction. Soil and Tillage Research. 94(2), 482-492
[Journal article]Authored by: Hedley, M., Saggar, S.
Loganathan, P., Liu, Q., Hedley, MJ., & Gray, CW. (2007). Chemical fractionation of fluorine in soils with a long-term phosphate fertiliser history. Australian Journal of Soil Research. 45(5), 390-396
[Journal article]Authored by: Hedley, M.
Monaghan, RM., Hedley, MJ., Di, HJ., McDowell, RW., Cameron, KC., & Ledgard, SF. (2007). Nutrient management in New Zealand pastures— recent developments and future issues. New Zealand Journal of Agricultural Research. 50(2), 181-201
[Journal article]Authored by: Hedley, M.
Grace, ND., Loganathan, P., & Hedley, MJ. (2007). The effect of a temporal change in ingestion rates of fluorine (F) in soil on the concentration of F in serum and bone of young sheep. New Zealand Veterinary Journal. 55(2), 77-80
[Journal article]Authored by: Hedley, M.
Loganathan, P., Bretherton, MR., & Hedley, MJ. (2007). Effect of soil cultivation and winter pugging on fluorine distribution in soil profiles under pasture following long-term applications of phosphate fertilisers. Australian Journal of Soil Research. 45(1), 41-47
[Journal article]Authored by: Bretherton, M., Hedley, M.
Aye, TM., Nguyen, ML., Bolan, NS., & Hedley, MJ. (2006). Phosphorus in soils of riparian and non-riparian wetland and buffer strips in the Waikato area, New Zealand. New Zealand Journal of Agricultural Research. 49(3), 349-358
[Journal article]Authored by: Hedley, M.
Loganathan, P., & Hedley, MJ. (2006). Spatial and time-dependent patterns of selenium (Se) release from selected Se fertiliser granules. Australian Journal of Soil Research. 44(2), 155-163
[Journal article]Authored by: Hedley, M.
Liu, Q., Loganathan, P., Hedley, MJ., & Skinner, MF. (2006). Root processes influencing phosphorus availability in volcanic soils under young Pinus radiata plantations. Canadian Journal of Forest Research. 36(8), 1913-1920
[Journal article]Authored by: Hedley, M.
Loganathan, P., Gray, CW., Hedley, MJ., & Roberts, AHC. (2006). Total and soluble fluorine concentrations in relation to properties of soils in New Zealand. European Journal of Soil Science. 57(3), 411-421
[Journal article]Authored by: Hedley, M.
Bhupinderpal-Singh, ., Hedley, MJ., & Saggar, S. (2005). In situ dynamics of recently allocated <sup>14</sup>C in pasture soil and soil solution collected with Rhizon Soil Moisture Samplers. Australian Journal of Soil Research. 43(5), 659-666
[Journal article]Authored by: Hedley, M., Saggar, S.
Bhupinderpal-Singh, ., Hedley, MJ., & Saggar, S. (2005). Characterization of recently <sup>14</sup>C pulse-labelled carbon from roots by fractionation of soil organic matter. European Journal of Soil Science. 56(3), 329-341
[Journal article]Authored by: Hedley, M., Saggar, S.
Grace, ND., Loganathan, P., Deighton, MW., Molano, G., & Hedley, MJ. (2005). Ingestion of soil fluorine: Its impact on the fluorine metabolism of dairy cows. New Zealand Journal of Agricultural Research. 48(1), 23-27
[Journal article]Authored by: Hedley, M.
Liu, Q., Loganathan, P., & Hedley, MJ. (2005). Influence of ectomycorrhizal hyphae on phosphate fractions and dissolution of phosphate rock in rhizosphere soils of Pinus radiata. Journal of Plant Nutrition. 28(9), 1525-1540
[Journal article]Authored by: Hedley, M.
Loganathan, P., Hedley, MJ., Bolan, NS., & Currie, LD. (2005). Field evaluation of the liming value of two phosphate rocks and their partially acidulated products after 16 years of annual application to grazed pasture. Nutrient Cycling in Agroecosystems. 72(3), 287-297
[Journal article]Authored by: Currie, L., Hedley, M.
Hedley, MJ., Houlbrooke, DJ., Horne, DJ., & Hanly, JA. (2004). Land treatment of farm dairy effluent in New Zealand: Nutrients and Pathogenic Organisms. Global Perspective on Livestock Waste Management. , 51-60
[Journal article]Authored by: Hanly, J., Hedley, M.
Houlbrooke, DJ., Horne, DJ., Hedley, MJ., Hanly, JA., Scotter, DR., & Snow, VO. (2004). Minimising surface water pollution resulting from farm-dairy effluent application to mole-pipe drained soils. I. An evaluation of the deferred irrigation system for sustainable land treatment in the Manawatu. New Zealand Journal of Agricultural Research. 47(4), 405-415
[Journal article]Authored by: Hanly, J., Hedley, M.
Houlbrooke, DJ., Horne, DJ., Hedley, MJ., & Hanly, JA. (2004). The performance of travelling effluent irrigators: Assessment, modification, and implications for nutrient loss in drainage water. New Zealand Journal of Agricultural Research. 47(4), 587-596
[Journal article]Authored by: Hanly, J., Hedley, M.
Houlbrooke, DJ., Horne, DJ., Hedley, MJ., Hanly, JA., & Snow, VO. (2004). A review of literature on the land treatment of farm-dairy effluent in New Zealand and its impact on water quality. New Zealand Journal of Agricultural Research. 47(4), 499-511
[Journal article]Authored by: Hanly, J., Hedley, M.
Loganathan, P., Hedley, MJ., Bretherton, MR., & Rowarth, JS. (2004). Accounting for particle movement when assessing the dissolution of slow release fertilizers in field soils. NUTRIENT CYCLING IN AGROECOSYSTEMS. 70(1), 77-84
[Journal article]Authored by: Bretherton, M., Hedley, M.
Liu, Q., Loganathan, P., Hedley, MJ., & Skinner, MF. (2004). The mobilisation and fate of soil and rock phosphate in the rhizosphere of ectomycorrhizal Pinus radiata seedlings in an Allophanic soil. Plant and Soil. 264(1-2), 219-229
[Journal article]Authored by: Hedley, M.
Bhupinderpal-Singh, ., Hedley, MJ., Saggar, S., & Francis, GS. (2004). Chemical fractionation to characterize changes in sulphur and carbon in soil caused by management. European Journal of Soil Science. 55(1), 79-90
[Journal article]Authored by: Hedley, M., Saggar, S.
Cronin, SJ., Neall, VE., Lecointre, JA., Hedley, MJ., & Loganathan, P. (2003). Environmental hazards of fluoride in volcanic ash: A case study from Ruapehu volcano, New Zealand. Journal of Volcanology and Geothermal Research. 121(3-4), 271-291
[Journal article]Authored by: Hedley, M.
Bhandral, R., Saggar, S., Bolan, NS., & Hedley, MJ. (2003). Nitrous oxide fluxes in soil as influenced by compaction. Proceedings of the New Zealand Grassland Association. 65, 265-268
[Journal article]Authored by: Hedley, M.
Houlbrooke, DJ., Horne, DJ., Hedley, MJ., Hanly, JA., & Snow, VO. (2003). The impact of intensive dairy farming on the leaching losses of nitrogen and phosphorus from a mole an dpipe drained soil. New Zealand Grassland Association. 65, 179-184
[Journal article]Authored by: Hanly, J., Hedley, M.
Trolove, SN., Hedley, MJ., Kirk, GJD., Bolan, NS., & Loganathan, P. (2003). Progress in selected areas of rhizosphere research on P acquisition. Australian Journal of Soil Research. 41(3), 471-499
[Journal article]Authored by: Hedley, M.
Loganathan, P., Hedley, MJ., Grace, ND., Lee, J., Cronin, SJ., Bolan, NS., . . . Zanders, JM. (2003). Fertiliser contaminants in New Zealand grazed pasture with special reference to cadmium and fluorine: A review. Australian Journal of Soil Research. 41(3), 501-532
[Journal article]Authored by: Hedley, M.
Grace, ND., Loganathan, P., Hedley, MJ., & Wallace, GC. (2003). Ingestion of soil fluorine: Its impact on the fluorine metabolism and status of grazing young sheep. New Zealand Journal of Agricultural Research. 46(4), 279-286
[Journal article]Authored by: Hedley, M., Wallace, G.
Zoysa, AKN., Loganathan, P., & Hedley, MJ. (2001). Comparison of the agronomic effectiveness of a phosphate rock and triple superphosphate as phosphate fertilisers for tea (Camellia sinensis L.) on a strongly acidic Ultisol. Nutrient Cycling in Agroecosystems. 59(2), 95-105
[Journal article]Authored by: Hedley, M.
Loganathan, P., Hedley, MJ., Wallace, GC., & Roberts, AHC. (2001). Fluoride accumulation in pasture forages and soils following long-term applications of phosphorus fertilisers. Environmental Pollution. 115(2), 275-282
[Journal article]Authored by: Hedley, M., Wallace, G.
Robinson, B., Russell, C., Hedley, M., & Clothier, B. (2001). Cadmium adsorption by rhizobacteria: Implications for New Zealand pastureland. Agriculture, Ecosystems and Environment. 87(3), 315-321
[Journal article]Authored by: Hedley, M.
Cronin, SJ., Manoharan, V., Hedley, MJ., & Loganathan, P. (2000). Fluoride: A review of its fate, bioavailability, and risks of fluorosis in grazed-pasture systems in New Zealand. New Zealand Journal of Agricultural Research. 43(3), 295-321
[Journal article]Authored by: Hedley, M.
Moir, JL., Scotter, DR., Hedley, MJ., & Mackay, AD. (2000). A climate-driven, soil fertility dependent, pasture production model. New Zealand Journal of Agricultural Research. 43(4), 491-500
[Journal article]Authored by: Hedley, M.
Liao, MT., Hedley, MJ., Woolley, DJ., Brooks, RR., & Nichols, MA. (2000). Copper uptake and translocation in chicory (Cichorium intybus L. cv Grasslands Puna) and tomato (Lycopersicon esculentum Mill. cv Rondy) plants grown in NFT system. II. The role of nicotianamine and histidine in xylem sap copper transport. Plant and Soil. 223(1-2), 243-252
[Journal article]Authored by: Hedley, M.
Liao, MT., Hedley, MJ., Woolley, DJ., Brooks, RR., & Nichols, MA. (2000). Copper uptake and translocation in chicory (Cichorium intybus L. cv. Grasslands Puna) and tomato (Lycopersicon esculentum Mill. cv. Rondy) plants grown in NFT system. I. Copper uptake and distribution in plants. Plant and Soil. 221(2), 135-142
[Journal article]Authored by: Hedley, M.
Loganathan, P., Louie, K., Lee, J., Hedley, MJ., Roberts, AHC., & Longhurst, RD. (1999). A model to predict kidney and liver cadmium concentrations in grazing animals. New Zealand Journal of Agricultural Research. 42(4), 423-432
[Journal article]Authored by: Hedley, M.
Saggar, S., Hedley, MJ., White, RE., Perrott, KW., Gregg, PEH., Cornforth, IS., . . . Sinclair, AG. (1999). Development and evaluation of an improved soil test for phosphorus, 3: Field comparison of Olsen, Colwell and Resin soil P tests for New Zealand pasture soils. Nutrient Cycling in Agroecosystems. 55(1), 35-50
[Journal article]Authored by: Hedley, M., Saggar, S.
Robinson, BH., Brooks, RR., & Hedley, MJ. (1999). Cobalt and nickel accumulation in nyssa (tupelo) species and its significance for New Zealand agriculture. New Zealand Journal of Agricultural Research. 42(3), 235-240
[Journal article]Authored by: Hedley, M.
Zanders, JM., Hedley, MJ., Palmer, AS., Tillman, RW., & Lee, J. (1999). The source and distribution of cadmium in soils on a regularly fertilised hill-country farm. Australian Journal of Soil Research. 37(4), 667-678
[Journal article]Authored by: Hedley, M., Palmer, A.
Wang, HL., Hedley, MJ., Bolan, NS., & Horne, DJ. (1999). The influence of surface incorporated lime and gypsiferous by-products on surface and subsurface soil acidity. II. Root growth and agronomic implications. Australian Journal of Soil Research. 37(1), 181-190
[Journal article]Authored by: Hedley, M.
Wang, HL., Hedley, MJ., Bolan, NS., & Horne, DJ. (1999). The influence of surface incorporated lime and gypsiferous by-products on surface and subsurface soil acidity. I. Soil solution chemistry. Australian Journal of Soil Research. 37(1), 165-180
[Journal article]Authored by: Hedley, M.
Zoysa, AKN., Loganathan, P., & Hedley, MJ. (1999). Phosphorus utilisation efficiency and depletion of phosphate fractions in the rhizosphere of three tea (Camellia sinensis L.) clones. Nutrient Cycling in Agroecosystems. 53(2), 189-201
[Journal article]Authored by: Hedley, M.
Zoysa, AKN., Loganathan, P., & Hedley, MJ. (1998). Phosphate rock dissolution and transformation in the rhizosphere of tea (Camellia sinensis L.) compared with other plant species. European Journal of Soil Science. 49(3), 477-486
[Journal article]Authored by: Hedley, M.
Cronin, SJ., Hedley, MJ., Neall, VE., & Smith, RG. (1998). Agronomic impact of tephra fallout from the 1995 and 1996 Ruapehu Volcano eruptions, New Zealand. Environmental Geology. 34(1), 21-30
[Journal article]Authored by: Hedley, M.
Zoysa, AKN., Loganathan, P., & Hedley, MJ. (1998). Effect of forms of nitrogen supply on mobilisation of phosphorus from a phosphate rock and acidification in the rhizosphere of tea. Australian Journal of Soil Research. 36(3), 373-387
[Journal article]Authored by: Hedley, M.
Zoysa, AKN., Loganathan, P., & Hedley, MJ. (1997). A technique for studying rhizosphere processes in tree crops: Soil phosphorus depletion around camellia (camellia japonica l.) roots. Plant and Soil. 190(2), 253-265
[Journal article]Authored by: Hedley, M.
Cronin, SJ., Hedley, MJ., Smith, RG., & Neall, VE. (1997). Impact of ruapehu ash fall on soil and pasture nutrient status 1. october 1995 eruptions. New Zealand Journal of Agricultural Research. 40(3), 383-395
[Journal article]Authored by: Hedley, M.
Loganathan, P., & Hedley, MJ. (1997). Downward movement of cadmium and phosphorus from phosphatic fertilisers in a pasture soil in New Zealand. Environmental Pollution. 95(3), 319-324
[Journal article]Authored by: Hedley, M.
Trolove, SN., Hedley, MJ., Caradus, JR., & Mackay, AD. (1996). Uptake of phosphorus from different sources by Lotus pedunculatus and three genotypes of Trifolium repens. 2. Forms of phosphate utilised and acidification of the rhizosphere. Australian Journal of Soil Research. 34(6), 1027-1040
[Journal article]Authored by: Hedley, M.
Trolove, SN., Hedley, MJ., Caradus, JR., & Mackay, AD. (1996). Uptake of phosphorus from different sources by Lotus pedunculatus and three genotypes of Trifolium repens. 1. Plant yield and phosphate efficiency. Australian Journal of Soil Research. 34(6), 1015-1026
[Journal article]Authored by: Hedley, M.
Wang, Y., Waghorn, GC., McNabb, WC., Barry, TN., Hedley, MJ., & Shelton, ID. (1996). Effect of condensed tannins in Lotus corniculatus upon the digestion of methionine and cysteine in the small intestine of sheep. Journal of Agricultural Science. 127(3), 413-421
[Journal article]Authored by: Hedley, M., McNabb, W.
Loganathan, P., Hedley, MJ., Gregg, PEH., & Currie, LD. (1996). Effect of phosphate fertiliser type on the accumulation and plant availability of cadmium in grassland soils. Nutrient Cycling in Agroecosystems. 46(3), 169-178
[Journal article]Authored by: Currie, L., Hedley, M.
Andrewes, P., Town, RM., Hedley, MJ., & Loganathan, P. (1996). Measurement of plant-available cadmium in New Zealand soils. Australian Journal of Soil Research. 34(3), 441-452
[Journal article]Authored by: Hedley, M.
Mahimairaja, S., Bolan, NS., & Hedley, MJ. (1995). Denitrification losses of N from fresh and composted manures. Soil Biology and Biochemistry. 27(9), 1223-1225
[Journal article]Authored by: Hedley, M.
Wang, HL., Hedley, MJ., & Bolan, NS. (1995). Chemical properties of fluidised bed boiler ash relevant to its use as a liming material and fertiliser. New Zealand Journal of Agricultural Research. 38(2), 249-256
[Journal article]Authored by: Hedley, M.
Loganathan, P., Mackay, AD., Lee, J., & Hedley, MJ. (1995). Cadmium distribution in hill pastures as influenced by 20 years of phosphate fertilizer application and sheep grazing. Australian Journal of Soil Research. 33(5), 859-871
[Journal article]Authored by: Hedley, M.
Mahirnairaja, S., Bolan, NS., & Hedley, MJ. (1995). Agronomic effectiveness of poultry manure composts. Communications in Soil Science and Plant Analysis. 26(11-12), 1843-1861
[Journal article]Authored by: Hedley, M.
Mahimairaja, S., Bolan, NS., & Hedley, MJ. (1994). Dissolution of phosphate rock during the composting of poultry manure: an incubation experiment. Fertilizer Research. 40(2), 93-104
[Journal article]Authored by: Hedley, M.
Sakadevan, K., Hedley, MJ., & Mackay, AD. (1994). An in situ mini lysimeter with a removable ion exchange resin trap for measuring nutrient losses by leaching from grazed pastures. Australian Journal of Soil Research. 32(6), 1389-1400
[Journal article]Authored by: Hedley, M.
Loganathan, P., Hedley, MJ., & Bretherton, MR. (1994). The agronomic value of co-granulated Christmas Island Grade C phosphate rock and elemental sulphur. Fertilizer Research. 39(3), 229-237
[Journal article]Authored by: Bretherton, M., Hedley, M.
Hedley, MJ., Kirk, GJR., & Santos, MB. (1994). Phosphorus efficiency and the forms of soil phosphorus utilized by upland rice cultivars. Plant and Soil. 158(1), 53-62
[Journal article]Authored by: Hedley, M.
Mahimairaja, S., Bolan, NS., Hedley, MJ., & Macgregor, AN. (1994). Losses and transformation of nitrogen during composting of poultry manure with different amendments: An incubation experiment. Bioresource Technology. 47(3), 265-273
[Journal article]Authored by: Hedley, M.
Mahimairaja, S., Bolan, NS., & Hedley, MJ. (1993). Absorption of ammonia released from poultry manure to soil and bark and the use of absorbed ammonia in solubilizing phosphate rock. Compost Science and Utilization. 1(1), 101-112
[Journal article]Authored by: Hedley, M.
Loganathan, P., & Hedley, MJ. (1993). Single superphosphate - reactive phosphate rock mixtures. 3. The use of concentration ratios of elements to identify the nature and amounts of unacidulated rock residues in the mixtures. Fertilizer Research. 36(3), 203-210
[Journal article]Authored by: Hedley, M.
SAKADEVAN, K., MACKAY, AD., & HEDLEY, MJ. (1993). Sulphur cycling in New Zealand hill country pastures. II. The fate of fertilizer sulphur. Journal of Soil Science. 44(4), 615-624
[Journal article]Authored by: Hedley, M.
Tambunan, D., Hedley, MJ., Bolan, NS., & Turner, MA. (1993). A comparison of sequential extraction procedures for measuring phosphate rock residues in soils. Fertilizer Research. 35(3), 183-191
[Journal article]Authored by: Hedley, M.
Bolan, NS., Hedley, MJ., & Loganathan, P. (1993). Preparation, forms and properties of controlled-release phosphate fertilizers. Fertilizer Research. 35(1-2), 13-24
[Journal article]Authored by: Hedley, M.
Sakadevan, K., Mackay, AD., & Hedley, MJ. (1993). Influence of sheep excreta on pasture uptake and leaching losses of sulfur, nitrogen and potassium from grazed pastures. Australian Journal of Soil Research. 31(2), 151-162
[Journal article]Authored by: Hedley, M.
SAKADEVAN, K., HEDLEY, MJ., & MACKAY, AD. (1993). Sulphur cycling in New Zealand hill country pastures. I. Laboratory sulphur, nitrogen and carbon mineralization studies. Journal of Soil Science. 44(1), 73-83
[Journal article]Authored by: Hedley, M.
Saggar, S., Hedley, MJ., White, RE., Gregg, PEH., Perrott, KW., & Cornforth, IS. (1993). Assessment of the relative agronomic effectiveness of phosphate rocks under glasshouse conditions. Fertilizer Research. 34(2), 141-151
[Journal article]Authored by: Hedley, M., Saggar, S.
Sakadevan, K., Hedley, MJ., & Mac Kay, AD. (1993). Mineralisation and fate of soil sulphur and nitrogen in hill pastures. New Zealand Journal of Agricultural Research. 36(2), 271-281
[Journal article]Authored by: Hedley, M.
Saggar, S., Hedley, MJ., & White, RE. (1992). Development and evaluation of an improved soil test for phosphorus: 1. The influence of phosphorus fertilizer solubility and soil properties on the extractability of soil P. Fertilizer Research. 33(1), 81-91
[Journal article]Authored by: Hedley, M., Saggar, S.
Saggar, S., Hedley, MJ., White, RE., Gregg, PEH., Perrott, KW., & Cornforth, IS. (1992). Development and evaluation of an improved soil test for phosphorus. 2. Comparison of the Olsen and mixed cation-anion exchange resin tests for predicting the yield of ryegrass grown in pots. Fertilizer Research. 33(2), 135-144
[Journal article]Authored by: Hedley, M., Saggar, S.
Loganathan, P., Hedley, MJ., & Clark, SA. (1992). The manufacture and evaluation of granular potassium chloride fertilizers. Fertilizer Research. 31(3), 291-304
[Journal article]Authored by: Hedley, M.
Loganathan, P., Hedley, MJ., Clark, SA., & Bolan, NS. (1992). Granulation of finely crystalline ammonium sulphate using calcium oxide and sulphuric acid. Fertilizer Research. 31(1), 85-93
[Journal article]Authored by: Hedley, M.
Bolan, NS., Hedley, MJ., & White, RE. (1991). Processes of soil acidification during nitrogen cycling with emphasis on legume based pastures. Plant and Soil. 134(1), 53-63
[Journal article]Authored by: Hedley, M.
Williams, PH., Hedley, MJ., & Gregg, PEH. (1990). The effect of preferential flow of dairy cow urine and simulated rainfall on movement of potassium through undisturbed topsoil cores. Australian Journal of Soil Research. 28(6), 857-868
[Journal article]Authored by: Hedley, M.
Bolan, NS., White, RE., & Hedley, MJ. (1990). A Review of The Use of Phosphate Rocks As Fertilisers For Direct Application in Australia and New Zealand. Australian Journal of Experimental Agriculture. 30(2), 297-313
[Journal article]Authored by: Hedley, M.
Saggar, S., Hedley, MJ., & White, RE. (1990). A simplified resin membrane technique for extracting phosphorus from soils. Fertilizer Research. 24(3), 173-180
[Journal article]Authored by: Hedley, M., Saggar, S.
Mahimairaja, S., Bolan, NS., Hedley, MJ., & Macgregor, AN. (1990). Evaluation of methods of measurement of nitrogen in poultry and animal manures. Fertilizer Research. 24(3), 141-148
[Journal article]Authored by: Hedley, M.
Bolan, NS., & Hedley, MJ. (1990). Dissolution of phosphate rocks in soils. 2. Effect of pH on the dissolution and plant availability of phosphate rock in soil with pH dependent charge. Fertilizer Research. 24(3), 125-134
[Journal article]Authored by: Hedley, M.
Williams, PH., Gregg, PEH., & Hedley, MJ. (1990). Use of potassium bromide solutions to simulate dairy cow urine flow and retention in pasture soils. New Zealand Journal of Agricultural Research. 33(3), 489-495
[Journal article]Authored by: Hedley, M.
Bolan, NS., Hedley, MJ., Harrison, R., & Braithwaite, AC. (1990). Influence of manufacturing variables on characteristics and the agronomic value of partially acidulated phosphate fertilizers. Fertilizer Research. 26(1-3), 119-138
[Journal article]Authored by: Hedley, M.
Williams, PH., Gregg, PEH., & Hedley, MJ. (1990). Mass balance modelling of potassium losses from grazed dairy pasture. New Zealand Journal of Agricultural Research. 33(4), 661-668
[Journal article]Authored by: Hedley, M.
MacKay, AD., Brown, MW., Currie, LD., Hedley, MJ., Tillman, RW., & White, RE. (1990). Effect of shaking procedures on the neutral ammonium citrate soluble phosphate fraction in fertiliser materials. Journal of the Science of Food and Agriculture. 50(4), 443-457
[Journal article]Authored by: Currie, L., Hedley, M.
Saggar, S., Mackay, AD., Hedley, MJ., Lambert, MG., & Clark, DA. (1990). A nutrient-transfer model to explain the fate of phosphorus and sulphur in a Grazed Hill-Country pasture. Agriculture, Ecosystems and Environment. 30(3-4), 295-315
[Journal article]Authored by: Hedley, M., Saggar, S.
Williams, PH., Gregg, PEH., & Hedley, MJ. (1990). Fate of potassium in dairy cow urine applied to intact soil cores. New Zealand Journal of Agricultural Research. 33(1), 151-158
[Journal article]Authored by: Hedley, M.
Saggar, S., Hedley, MJ., Gillingham, AG., Rowarth, JS., Richardson, S., Bolan, NS., . . . Gregg, PEH. (1990). Predicting the fate of fertiliser sulphur in grazed hill country pastures by modelling the transfer and accumulation of soil phosphorus. New Zealand Journal of Agricultural Research. 33(1), 129-138
[Journal article]Authored by: Hedley, M., Saggar, S.
Bolan, NS., & Hedley, MJ. (1989). Dissolution of phosphate rocks in soils. 1. Evaluation of extraction methods for the measurement of phosphate rock dissolution. Fertilizer Research. 19(2), 65-75
[Journal article]Authored by: Hedley, M.
Williams, PH., Hedley, MJ., & Gregg, PEH. (1989). Uptake of potassium and nitrogen by pasture from urine-affected soil. New Zealand Journal of Agricultural Research. 32(3), 415-421
[Journal article]Authored by: Hedley, M.
Hedley, MJ., Bolan, NS., & Braithwaite, AC. (1988). Single superphosphate-reactive phosphate rock mixtures. 2. The effect of phosphate rock type and denning time on the amounts of acidulated and extractable phosphate. Fertilizer Research. 16(2), 179-194
[Journal article]Authored by: Hedley, M.
Williams, PH., Hedley, MJ., & Gregg, PEH. (1988). Effect of dairy cow urine on potassium adsorption by soil. New Zealand Journal of Agricultural Research. 31(4), 431-438
[Journal article]Authored by: Hedley, M.
Apthorp, JN., Hedley, MJ., & Tillman, RW. (1987). The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate. Fertilizer Research. 12(3), 269-283
[Journal article]Authored by: Hedley, M.
Bolan, NS., Hedley, MJ., Syers, JK., & Tillman, RW. (1987). Single superphosphate-reactive phosphate rock mixtures. 1. Factors affecting chemical composition. Fertilizer Research. 13(3), 223-239
[Journal article]Authored by: Hedley, M.
HEDLEY, MJ., NYE, PH., & WHITE, RE. (1983). PLANT-INDUCED CHANGES IN THE RHIZOSPHERE OF RAPE (BRASSICA-NAPUS VAR EMERALD) SEEDLINGS .4. THE EFFECT OF RHIZOSPHERE PHOSPHORUS STATUS ON THE PH, PHOSPHATASE-ACTIVITY AND DEPLETION OF SOIL-PHOSPHORUS FRACTIONS IN THE RHIZOSPHERE AND ON THE CATION ANION BALANCE IN THE PLANTS. NEW PHYTOLOGIST. 95(1), 69-82
[Journal article]Authored by: Hedley, M.
HEDLEY, MJ., WHITE, RE., & NYE, PH. (1982). PLANT-INDUCED CHANGES IN THE RHIZOSPHERE OF RAPE (BRASSICA-NAPUS VAR - EMERALD) SEEDLINGS .3. CHANGES IN L VALUE, SOIL PHOSPHATE FRACTIONS AND PHOSPHATASE-ACTIVITY. NEW PHYTOLOGIST. 91(1), 45-56
[Journal article]Authored by: Hedley, M.
HEDLEY, MJ., NYE, PH., & WHITE, RE. (1982). PLANT-INDUCED CHANGES IN THE RHIZOSPHERE OF RAPE (BRASSICA-NAPUS VAR - EMERALD) SEEDLINGS .2. ORIGIN OF THE PH CHANGE. NEW PHYTOLOGIST. 91(1), 31-44
[Journal article]Authored by: Hedley, M.
GRINSTED, MJ., HEDLEY, MJ., WHITE, RE., & NYE, PH. (1982). PLANT-INDUCED CHANGES IN THE RHIZOSPHERE OF RAPE (BRASSICA-NAPUS VAR - EMERALD) SEEDLINGS .1. PH CHANGE AND THE INCREASE IN P CONCENTRATION IN THE SOIL SOLUTION. NEW PHYTOLOGIST. 91(1), 19-29
[Journal article]Authored by: Hedley, M.
Hedley, MJ., & Stewart, JWB. (1982). Method to measure microbial phosphate in soils. Soil Biology and Biochemistry. 14(4), 377-385
[Journal article]Authored by: Hedley, M.
HEDLEY, MJ., WHITE, RE., & NYE, PH. (1982). PHOSPHORUS SOLUBILIZATION IN THE RHIZOSPHERE OF RAPE PLANTS (BRASSICA-NAPUS VAR EMERALD). JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE. 33(8), 734-734
[Journal article]Authored by: Hedley, M.
Hedley, MJ., Stewart, JWB., & Chauhan, BS. (1982). Changes in inorganic and organic soil phosphorus fractions induced by cultivation practices and by laboratory incubations.. Soil Science Society of America Journal. 46(5), 970-976
[Journal article]Authored by: Hedley, M.

Book

Kusumo, BH., Hedley, MJ., Tuohy, MP., Hedley, CB., & Arnold, GC. (2010). Predicting soil carbon and nitrogen and pasture root densities from proximally sensed soil spectral reflectance. In RAV. Rossel, A. McBratney, & B. Minasny (Eds.) Proximal Soil Sensing. (pp. 177 - 190). : Springer Verlag
[Chapter]Authored by: Hedley, M.
Lowe, DJ., Neall, VE., Hedley, MJ., Clothier, B., & MacKay, AD. (Eds.) (2010). Guidebook for pre-conference North Island, New Zealand ‘Volcanoes to Oceans’ field tour (27-30 July, 2010). 19th World Soils Congress, International Union of Soil Sciences, Brisbane. Soil and Earth Sciences Occasional Publication No. 3, Massey University. Massey University, Palmerston North: Massey University
[Edited Book]Authored by: Hedley, M.
Rowarth, JS., Camps Arbestain, M., & Hedley, MJ.(2009). Biochar. Wellington, NZ: NZX Ltd.
[Authored Book]Authored by: Camps Arbestain, M., Hedley, M.
Hedley, MJ. (2008). Techniques for assessing nutrient bioavailability in soils: Current and future issues.. In R. Naidu (Ed.) Chemical bioavailability in terrestrial environments. (pp. 283 - 328). : Elsevier
[Chapter]Authored by: Hedley, M.
Cameron, KC., Hedley, MJ., Clark, H., & Di, HJ. (2007). Impact of pasture and supplement feeding on the environment. In PV. Rattray, IM. Brookes, & AM. Nicol (Eds.) Pasture and Supplements for Grazing Animals. (pp. 287 - 309). Hamilton, NZ: New Zealand Society of Animal Production
[Chapter]Authored by: Hedley, M.
Hodgson, J., Cameron, K., Clark, D., Condron, L., Fraser, T., Hedley, MJ., . . . Woodfield, DR. (2005). New Zealand's pastoral industries: Efficient use of grassland resources. In SG. Reynolds, & J. Frame (Eds.) Grasslands: Developments, Opportunities, Perspectives. (pp. 181 - 205). Enfield, NH: Science Publishers
[Chapter]Authored by: Hedley, M., Kemp, P., Morris, S., Shadbolt, N.
Hedley, MJ., & McLaughlin, M. (2005). Reactions of Phosphate fertilizers and by-products in soils. In JT. Sims, & AN. Sharpley (Eds.) Phosphorus: Agriculture and the Environment. (pp. 181). Madison, WI: Soil Science Society of America
[Chapter]Authored by: Hedley, M.
Bolan, NS., & Hedley, MJ. (2003). Role of carbon, nitrogen, and sulfur cycles in soil acidification. In ZR. Ed (Ed.) Handbook of soil acidity. (pp. 29 - 56). New York, NY: Marcel Dekker
[Chapter]Authored by: Hedley, M.

Thesis

Hanly, JA. (2012). Management practices and technologies for reducing nitrogen and phosphorus losses from soils receiving farm dairy effluent. (Doctoral Thesis)
[Doctoral Thesis]Authored by: Hanly, J.Edited by: Hedley, M., Horne, D.
Draganova, IG. (2012). Nutrient distribution and behaviour of livestock in an intensively managed dairy system. (Doctoral Thesis) Draganova, IG. (2012). Nutrient distribution and behaviour of livestock in intensively managed dairy system. (Doctoral Thesis)
[Doctoral Thesis]Authored by: Draganova, I.Edited by: Hedley, M., Stafford, K., Yule, I.

Report

Hanly, JA., Christensen, CL., Toes, HB., & Hedley, MJ. (2010). The effect of DCD on N leaching and pasture accumulation from an artificially drained, grazed dairy pasture in the Manawatu.
[Commissioned Report]Authored by: Christensen, C., Hanly, J., Hedley, M.
Lindsay, C., Hedley, M., & Hanly, J.(2010). Effect of duration-controlled grazing on the concentrations of E. coli in surface runoff and drainage water. A research report as an output to a Agresearch sub-contract to the senior author..
[Technical Report]Authored by: Christensen, C., Hanly, J., Hedley, M.
Whitehead, D., Baisden, T., Beare, M., Campbell, D., Curtin, D., Davis, M., . . . Schipper, L. (2009). Review of soil carbon measurement methodologies and technologies, including nature and intensity of sampling, their uncertainties and costs. ( Report No. Landcare Research Contract Report: LC0910/083). Landcare Research,.
[Commissioned Report]Authored by: Hedley, M.
Hedley, MJ., Horne, DJ., Hanly, JA., & Monaghan, R. (2005). New generation solutions for capturing nutrients in drainage. Fertilizer and Lime Research Centre, Massey University.
[Commissioned Report]Authored by: Hanly, J., Hedley, M.
Hedley, MJ., Horne, DJ., Hanly, JA., & Houlbrooke, DJ. (2004). A study of the impact of dairying on the quantity and quality of both artificial drainage and surface runoff. Fertiliser and Lime Research Centre, Massey University.
[Commissioned Report]Authored by: Hanly, J., Hedley, M., Horne, D.
Connolly, JH., Hedley, MJ., Ionas, G., Hanly, JA., Horne, DJ., Collins, R., . . . Ross, C. (2004). Pathogen transmission routes: Farm animals to water bodies (2002-2003). Massey University, Fertilizer and Lime Research Centre.
[Commissioned Report]Authored by: Hanly, J., Hedley, M., Horne, D.
Loganathan, P., Gray, CW., Hedley, MJ., & Roberts, JC. (2004). In what form is F accumulating in New Zealand pastoral soils and what soil properties result in its accumulation?: A progress report. Fertilizer and Lime Research Centre.
[Commissioned Report]Authored by: Hedley, M.
Lindsay, CL., Hanly, JA., Hedley, MJ., & Horne, DJ.Chapter 7 – Integrating mitigation strategies into existing and future farm systems: 7.2 Housed wintering systems.
[Commissioned Report]Authored by: Hanly, J., Hedley, M., Horne, D.

Conference

Jha, N., Hoogendoorn, CJ., Saggar, S., Giltrap, D., Bishop, P., Berben, P., . . . Hedley, M.Efficacy of Spikey® -applied nitrogen transformation process inhibitors for reducing nitrogen losses from urine applied to well-drained dairy soils in autumn-winter.. Paper presented at the meeting of Occasional Report No. 30. Fertilizer and Lime Research Centre. Massey University, Palmerston North
[Conference Paper]Authored by: Hedley, M., Jha, N.Edited by: Currie, L., Hedley, M.
Levine, B., Paterson, J., & Burkitt, LL. (2017). Phosphorus mitigation project: Mitigation of surface P runoff using detainment bunds. In L. Currie, & M. Hedley (Eds.) Science and policy: nutrient management challenges for the next generation. Vol. 30 (pp. 1 - 7). : 30th Annual Fertilizer and Lime Research Centre Workshop
[Conference Paper in Published Proceedings]Authored by: Burkitt, L.Edited by: Currie, L., Hedley, M.
Trodahl, M., Burkitt, LL., Bretherton, M., Deslippe, J., Jackson, B., & Metherell, A. (2017). Developing N and P export coefficients for rural New Zealand landscape modelling in LUCI. In LD. Currie, & MJ. Hedley (Eds.) Science and policy: Nutrient management challenges for the next generation. Vol. 30 (pp. 1 - 9). Massey University, New Zealand: 30th Annual FLRC Workshop, Massey University
[Conference Paper in Published Proceedings]Authored by: Bretherton, M., Burkitt, L.Edited by: Currie, L., Hedley, M.
Hanly, JA., Kamakazi, S., Christensen, CL., Hedley, MJ., & Horne, DJ. (2017). Effects of grazing management on nutrient anion and cation losses in drainage waters from dairy pastures. Science and policy: nutrient management challenges for the next generation. (Eds L. D. Currie and M. J. Hedley). http://flrc.massey.ac.nz/publications.html. Occasional Report No. 30. Fertilizer and Lime Research Centre. : Science and policy: nutrient management challenges for the next generation
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hanly, J., Hedley, M.
Singh, R., Elwan, A., Horne, D., Manderson, A., Patterson, M., & Roygard, J. (2017). Predicting land-based nitrogen loads and attenuation in the Rangitikei River catchment – the model development. In LD. Currie, & M. Hedley (Eds.) In: Science and policy: nutrient management challenges for the next generation. (Eds L. D. Currie and M. J. Hedley). Vol. Occasional Report No. 30 (pp. 1 - 13). Palmerston North, New Zealand: 30th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Horne, D., Singh, R.Edited by: Currie, L., Hedley, M.
Fransen, P., Burkitt, LL., Bretherton, M., Horne, D., Singh, R., Hickson, R., . . . Morris, S. (2017). Selection of cattle supplement feeding areas to reduce nutrient and sediment loss in surface runoff from hill country. In LD. Currie, & M. Hedley (Eds.) In: Science and policy: Nutrient management challenges for the next generation. Vol. Occasional Report No. 30 (pp. 1 - 5). Palmerston North, New Zealand: 30th Annual Fertilizer & Lime Research Centre Workshop
[Conference Paper in Published Proceedings]Authored by: Bretherton, M., Burkitt, L., Hickson, R., Horne, D., Morris, S., Singh, R.Edited by: Currie, L., Hedley, M.
McLaren, SJ., Singh, R., & Clothier, BE. (2017). Environmental certification: adding value for New Zealand’s primary producers, or a waste of time and money?. In LD. Currie, & M. Hedley (Eds.) In: Science and policy: nutrient management challenges for the next generation. (Eds L. D. Currie and M. J. Hedley). Vol. Occasional Report No. 30 (pp. 1 - 7). Palmerston North, New Zealand: 30th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Singh, R.Edited by: Currie, L., Hedley, M.
Smith, G., Singh, R., & Matthews, A. (2017). Assessing farm-scale nutrient flow pathways and nitrate attenuation in Rangitikei Sand Country. In LD. Currie, & M. Hedley (Eds.) In: Science and policy: nutrient management challenges for the next generation. (Eds L. D. Currie and M. J. Hedley). Vol. Occasional Report No. 30 (pp. 1 - 12). Palmerston North, New Zealand: 30th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Singh, R.Edited by: Currie, L., Hedley, M.
Hedley, M., Stafford, A., Anderson, C., Jeyakumar, J., Kusumo, B., Mitchell, C., . . . Calvelo Pereira, R. (2017). Mitigating elevated topsoil Cadmium with topsoil inversion tillage. Poster session presented at the meeting of 30th Annual FLRC Workshop. Palmerston North, New Zealand
[Conference Poster]Authored by: Anderson, C., Calvelo Pereira, R., Hedley, M.
Kaul, TM., Grafton, MCE., Hedley, MJ., & Yule, IJ. (2017). Understanding soil phosphorus variability with depth for the improvement of current soil sampling methods. Poster session presented at the meeting of 30th Annual Fertilizer and lime Research Centre Workshop. Palmerston North, New Zealand
[Conference Poster]Authored by: Grafton, M., Hedley, M., Yule, I.Contributed to by: Grafton, M.
Cushnahan, T., Yule, IJ., Grafton, MCE., Pullanagari, R., & White, M. (2017). The classification of hill country vegetation from hyperspectral imagery. In L. Currie, & M. Hedley (Eds.) Occasional Report Number 30. (pp. 1 - 9). : Fertilizer and Lime Research Centre
[Conference Paper in Published Proceedings]Authored by: Grafton, M., Pullanagari, R., Yule, I.Contributed to by: Grafton, M.Edited by: Currie, L., Hedley, M.
Hedley, MJ., Stafford, A., Anderson, CWA., Jeyakumar, P., Kusumo, B., Mitchell, C., . . . Calvelo-Pereira, R. (2017). Mitigating elevated topsoil cadmium with topsoil inversion tillage. In LD. Currie, & MJ. Hedley (Eds.) Science and Policy: Nutrient Management Challenges for the Next Generation. (pp. 88 - 88). : 30th Annual Fertilizer Lime Research Centre Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Hedley, M., Jeyakumar, P.Edited by: Currie, L., Hedley, M.
Thompson-Morrison, H., Anderson, CWN., Jeyakumar, P., Geretharan, T., Cavanagh, J., & Robinson, B. (2017). Cost-benefit analysis of cadmium management in New Zealand’s horticultural soils. In LD. Currie, & MJ. Hedley (Eds.) Science and Policy: Nutrient Management Challenges for the Next Generation. (pp. 1 - 4). : 30th Annual Fertilizer Lime Research Centre Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Jeyakumar, P.Edited by: Currie, L., Hedley, M.
Geretharan, T., Jeyakumar, P., Anderson, CWA., & Bretherton, M. (2017). Effects of soil properties on bioavailability of fluorine to microorganisms. In LD. Currie, & MJ. Hedley (Eds.) Science and Policy: Nutrient Management Challenges for the Next Generation. (pp. 89 - 89). Palmerston North, New Zealand: 30th Annual Fertilizer Lime Research Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Bretherton, M., Jeyakumar, P.Edited by: Currie, L., Hedley, M.
Stafford, A., Jeyakumar, P., Anderson, CWA., & Hedley, MJ. (2017). Influence of fluctuating soil moisture on cadmium phytoavailability and accumulation in plantain. In . L. D. Currie and M. J. Hedley (Ed.) Science and Policy: Nutrient Management Challenges for the Next Generation. (pp. 81 - 81). : 30th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Anderson, C., Hedley, M., Jeyakumar, P.
Howes, J., Hanly, JA., Horne, DJ., & Hedley, MJ. (2016, December). Using late summer/autumn duration controlled grazing of dairy cows to reduce nitrate loss to water. Presented at Soil – A Balance Act Down Under conference. NZ Society of Soil Science & Soil Science Australia
[Conference Oral Presentation]Authored by: Hanly, J., Hedley, M., Horne, D.
Singh, R., Horne, D., Roygard, J., & Hedley, M. (2016, June). Sensitive catchments – managing nutrient pathways and their attenuation in NZ agricultural catchments. Presented at Toward Sustainable Groundwater in Agriculture – An International Conference Linking Science and Policy. Burlingame/San Francisco, USA.
[Conference Oral Presentation]Authored by: Hedley, M., Horne, D., Singh, R.
Singh, R., Horne, D., Burkitt, LL., Roygard, J., & Hedley, M. (2016, December). Effective management of nutrient flow pathways and their attenuation in NZ agricultural catchments. Presented at NZASSS Conference ‘Soil, a Balancing Act Downunder’. Queenstown, New Zealand.
[Conference Oral Presentation]Authored by: Burkitt, L., Hedley, M., Horne, D., Singh, R.
Singh, R., Rivas, A., Horne, D., Roygard, J., Matthews, A., & Hedley, M. (2016). Variability in denitrification characteristics of vadose zone and saturated zones in the Manawatu River catchment. In In: Integrated nutrient and water management for sustainable farming. (Eds L. D. Currie and R. Singh) Vol. Occasional Report No. 29 , 29th Annual FLRC Workshop Palmerston North, New Zealand: Fertilizer and Lime Research Centre, Massey University
[Conference Abstract]Authored by: Hedley, M., Horne, D., Singh, R.
Singh, R., Horne, D., Roygard, J., & Hedley, M. (2016). Sensitive catchments – managing nutrient pathways and their attenuation in NZ agricultural catchments. In http://ag-groundwater.org/files/242695.pdf(pp. 1 - 1). , ‘Toward Sustainable Groundwater in Agriculture – An International Conference Linking Science and Policy’
[Conference Abstract]Authored by: Hedley, M., Horne, D., Singh, R.
Singh, R., Horne, D., Burkitt, LL., Roygard, J., & Hedley, M. (2016). Effective management of nutrient flow pathways and their attenuation in NZ agricultural catchments. In http://www.nzsssconference.co.nz/images/Ranvir_Singh.pdf(pp. 1 - 1). , NZASSS Conference ‘Soil, a Balancing Act Downunder’
[Conference Abstract]Authored by: Burkitt, L., Hedley, M., Horne, D., Singh, R.
Burkitt, LL., Bretherton, M., Singh, R., & Hedley, M. (2016). Comparing stream nutrient loads to overseer estimates for a hill country sub-catchment. (pp. 1 - 1). , NZASSS Conference ‘Soil, a Balancing Act Downunder’,
[Conference Abstract]Authored by: Bretherton, M., Burkitt, L., Hedley, M., Singh, R.
Burkitt, LL., Bretherton, M., Singh, R., & Hedley, M. (2016). Comparing nutrient loss predictions using overseer and stream water quality in a hill country sub-catchment. In LD. Currie, & R. Singh (Eds.) In: Integrated nutrient and water management for sustainable farming. (Eds L. D. Currie and R. Singh). Vol. Occasional Report No. 29 (pp. 1 - 9). Palmerston North, New Zealand: 29th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Bretherton, M., Burkitt, L., Hedley, M., Singh, R.Edited by: Currie, L., Singh, R.
Calvelo Pereira, R., Hedley, M., Bishop, P., Stafford, A., & Anderson, C. (2016, December). Costs of deep, mouldboard ploughing at pasture renewal to accelerate carbon sequestration and decrease contaminant bioavailability. Presented at New Zealand Society of Soil Science and Soil Science Australia Conference. Queenstown, New Zealand.
[Conference Oral Presentation]Authored by: Anderson, C., Calvelo Pereira, R., Hedley, M.
Calvelo Pereira, R., Hedley, M., Camps Arbestain, M., Bishop, P., Enongene, KE., & Otene, IJJ. (2016, December). Evidence for soil carbon enhancement through deeper ploughing at pasture renovation on a Pallic soil. Presented at New Zealand Society of Soil Science and Soil Science Australia Conference. Queenstown, New Zealand.
[Conference Oral Presentation]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M.
Walker, H., Hedley, M., & Calvelo Pereira, R. (2016, December). Effect of plant species, part and rate of application on the extent of litter decomposition. Presented at New Zealand Society of Soil Science and Soil Science Australia Conference. Queenstown, New Zeland.
[Conference Oral Presentation]Authored by: Calvelo Pereira, R., Hedley, M.
Singh, R., Rivas, A., Elwan, A., Horne, D., Burkitt, LL., Roygard, J., . . . Hedley, M. (2015, September). Assessment of nitrogen attenuation in the subsurface environment of Manawatu River catchment, New Zealand. Presented at Land Use and Water Quality 2015. Vienna, Austria.
[Conference Oral Presentation]Authored by: Burkitt, L., Hedley, M., Horne, D., Singh, R.
Singh, R., Rivas, A., Elwan, A., Martindale, H., Horne, D., Burkitt, LL., . . . Hedley, M. (2015, September). Research for catchment attenuation processes: advancing knowledge and tools to account for nitrogen transport and transformation in NZ agricultural catchments. Presented at Catchment Science 2015. Wexford, Ireland.
[Conference Oral Presentation]Authored by: Burkitt, L., Hedley, M., Horne, D., Singh, R.
Rivas, A., Singh, R., Horne, D., Roygard, J., Matthews, A., & Hedley, M. (2015). Variability in hydrochemical conditions in shallow groundwater in the Manawatu River catchment and implications for denitrification potential. In In: Handbook of the NZ Hydrological Society Annual Conference ‘From Data to Knowledge’, NZ Hydrological Society Annual Conference ‘From Data to Knowledge’
[Conference Abstract]Authored by: Hedley, M., Horne, D., Singh, R.
Singh, R., Rivas, A., Elwan, A., Horne, DJ., Burkitt, LL., Roygard, J., . . . Hedley, M. (2015). Assessment of nitrogen attenuation in the subsurface environment of Manawatu River catchment, New Zealand. In In the proceedings of the international conference ‘Land Use and Water Quality 2015’, ‘Land Use and Water Quality 2015’
[Conference Abstract]Authored by: Burkitt, L., Hedley, M., Horne, D., Singh, R.
Singh, R., Rivas, A., Elwan, A., Heather, M., Horne, D., Burkitt, LL., . . . Hedley, M. (2015). Research for catchment attenuation processes: advancing knowledge and tools to account for nitrogen transport and transformation in NZ agricultural catchments. In In the proceedings of the international conference ‘Catchment Science 2015’, ‘Catchment Science 2015’ Wexford, Ireland
[Conference Abstract]Authored by: Burkitt, L., Hedley, M., Horne, D., Singh, R.
Rivas, A., Singh, R., Horne, D., Roygard, J., Matthews, A., & Hedley, M. (2015). An assessment of the denitrification potential in shallow groundwaters of the Manawatu River catchment. In LL. Currie, & LL. Burkitt (Eds.) In: Moving farm systems to improved attenuation. (Eds L.D. Currie and L.L Burkitt). Vol. Occasional Report No. 28 (pp. 1 - 15). Palmerston North, New Zealand: 28th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Horne, D., Singh, R.Edited by: Burkitt, L., Currie, L.
Horne, D., Bretherton, M., Draganova, I., Hedley, M., & Morris, S. (2014). Wintering cattle in hill country: Monitoring the impacts on the soil resource. Occasional Report No. 27. Fertilizer and Lime Research Centre, Massey University, Palmerston North, New Zealand. (pp. 1 - 1). : 27th Annual FLRC Workshop: Nutrient Management for the Farm, Catchment and Community
[Conference Paper in Published Proceedings]Authored by: Bretherton, M., Draganova, I., Hedley, M., Horne, D.
Christensen, CL., Horne, DJ., Hedley, MJ., & Hanly, JA.Duration-controlled grazing on dairy farms: decision support for timing of slurry re-application. Paper presented at the meeting of Occasional Report No. 27. Fertilizer and Lime Research Centre, Massey University, Palmerston North. Massey University, Palmerston North, New Zealand
[Conference Paper]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.Edited by: Christensen, C., Currie, L.
Hedley, MJ., Christensen, CL., Horne, DJ., Hanly, JA., & Margerison, JK.Critical components of duration controlled grazing systems for productivity gain and footprint reduction. Paper presented at the meeting of Proceedings of the 6th Australasian Dairy Science Symposium. Hamilton
[Conference Paper]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.
Walker, H., & Hedley, MJ.The Extent of Decomposition in Soil of Clover (Trifolium Repens) and Lotus (Lotus Pendunulatus) Shoot and Root Material Influenced by Incubation Technique. . The University of Waikato, Hamilton.
[Conference Paper]Authored by: Hedley, M.
Howes, J., Horne, DJ., Hanly, JA., & Hedley, MJ.Increasing Pasture Utilisation on a Dairy Farm with a Freestall Barn, through Soil Protection and Application of Slurry. . The University of Waikato, Hamilton.
[Conference Paper]Authored by: Hanly, J., Hedley, M., Horne, D.
Christensen, CL., Hedley, MJ., Hanly, JA., & Horne, DJ.Determining the most effective period to implement duration-controlled grazing of cows for reducing N leaching losses.. . The University of Waikato, Hamilton
[Conference Paper]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.
Sharpley, AN., Hedley, MJ., & Currie, LD.Syers on the Environmental Impact of Agriculture on Water Quality.. Paper presented at the meeting of Proceedings of 20th World Congress of Soil Science. Jeju, Korea
[Conference Paper]Authored by: Currie, L., Hedley, M.
Curtin, D., Hedley, MJ., Tillman, RWT., Bolan, NS., & O’donnell, AJ.Contributions of Keith Syers to Knowledge of the Sulphur Cycle.. Paper presented at the meeting of Proceedings of 20th World Congress of Soil Science. Jeju, Korea
[Conference Paper]Authored by: Hedley, M.
Hedley, MJ., Bolan, NS., Mackay, AD., Gregg, PEH., & Olegario-Bunoan, A.J.K. Syers a Protagonist for the Direct Application of Reactive Phosphate Rocks to Pasture Soils.. Paper presented at the meeting of Proceedings of 20th World Congress of Soil Science. Jeju, Korea
[Conference Paper]Authored by: Hedley, M.
Curtin, D., Hedley, MJ., Tillman, RWT., Bolan, NS., & O’donnell, A. (2014, June). Contributions of Keith Syers to Knowledge of the Sulphur Cycle.. Presented at In The lifetime Contributions of Professor J. Keith Syers to International Soil Science - A Memorial Symposium.. Jeju, Korea.
[Conference Oral Presentation]Authored by: Hedley, M.
Burkitt, L., Singh, R., Bretherton, M., Tuohy, M., Hedley, C., Roudier, P., . . . Hedley, M. (2014). LiDAR verses freely available DEM data – is the greater precision worth it?. Poster session presented at the meeting of NZ Society of Soil Science Conference ‘Soil Science for Future Generations’. Hamilton, New Zealand
[Conference Poster]Authored by: Bretherton, M., Burkitt, L., Hedley, M., Singh, R., Tuohy, M.
Rivas, A., Singh, R., Horne, D., Roygard, J., Matthews, A., & Hedley, M. (2014). Indications of denitrification potential and occurrence in groundwater in the Manawatu Catchment. , the Joint Conference for the NZ Hydrological Society, NZ Freshwater Sciences Society and IPENZ Rivers Group ‘2014 Water Symposium – Integration: The Final Frontier’
[Conference Abstract]Authored by: Hedley, M., Horne, D., Singh, R.
Rivas, A., Singh, R., Horne, D., Roygard, J., Matthews, A., & Hedley, M. (2014). Characterization of denitrification in the subsurface environment of the Manawatu river catchment, New Zealand. 21st Century Watershed Technology Conference and Workshop ‘Improving Water Quality and the Environment’. (pp. 1 - 11). : 21st Century Watershed Technology Conference and Workshop ‘Improving Water Quality and the Environment’
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Horne, D., Singh, R.
Calvelo Pereira, R., Hedley, M., Bishop, P., Camps Arbestain, M., Pullanagari, R., & Kusumo, BH. (2014). Added value of using high-ash biochar from biosolids to amend low fertility pasture soils of New Zealand. Poster session presented at the meeting of 20th World Congress of Soil Science. Jeju, Korea
[Conference Poster]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M., Pullanagari, R.
Christianson, LE., Hanly, JA., & Hedley, MJ. (2014). Suitability of three wood species for denitrification bioreactor fill. American Society of Agricultural and Biological Engineers Annual International Meeting 2014, ASABE 2014. Vol. 2 (pp. 1447 - 1457).
[Conference Paper in Published Proceedings]Authored by: Hanly, J., Hedley, M.
Horne, DJ., Hanly, JA., Hedley, MJ., & Christensen, CL. (2014). Effluent from animal shelters: Opportunities and challenges. New Zealand Land Treatment Collective 14th Annual Conference Proceedings. : New Zealand Land Treatment Collective
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.Edited by: Christensen, C., Currie, L.
Christensen, CL., Horne, DJ., Hedley, MJ., & Hanly, JA. (2014). Duration-controlled grazing on dairy farms: decision support for timing of slurry re-application. In Nutrient management for the farm, catchment and community, Fertilizer and Lime Research Centre Annual Workshop
[Conference Abstract]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.Edited by: Christensen, C., Currie, L.
Hanly, JA., Horne, DJ., Hedley, MJ., & Christensen, CL. (2014). Effluent from animal shelters: Opportunities and challenges. New Zealand Land Treatment Collective 14th Annual Conference Proceedings. : New Zealand Land Treatment Collective
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hedley, M., Horne, D.
Hanly, JA., Horne, DJ., Hedley, MJ., & Christensen, CL. (2014). Strategic capture of effluent to reduce N leaching on dairy farms with free draining soils: Assessing implications for effluent management and cost. In LD. Currie, & CL. Christensen (Eds.) Nutrient management for the farm, catchment and community. (pp. 1 - 7). : Fertilizer and Lime Research Centre Annual Workshop
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.Edited by: Christensen, C., Currie, L.
Bishop, P., Kusumo, B., Calvelo Pereira, R., Burkitt, L., Hedley, C., Hedley, M., . . . Camps, M. (2014). Assessment of denitrification potentials of grazed pasture soils. In LD. Currie, & CL. Christensen (Eds.) Nutrient Management for the Farm, Catchment and Community. Vol. Occasional Report No. 27 (pp. 1 - 7). Massey University, Palmerston North, New Zealand.: 27th Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Burkitt, L., Calvelo Pereira, R., Camps Arbestain, M., Hedley, M., Saggar, S.Edited by: Christensen, C., Currie, L.
Lau, J., Margerison, JK., Hedley, MJ., Horne, DJ., Hanly, JA., Powell, N., . . . Shilton, AN. (2013). Behaviour of New Zealand pasture-based cows offered access to free stalls fitted with sand or waterbeds, compared with cows at pasture. Proceedings of the New Zealand Society of Animal Production. Vol. 73 (pp. 186 - 188).
[Conference Paper in Published Proceedings]Authored by: Brown, N., Hanly, J., Hedley, M., Horne, D., Shilton, A.
Calvelo Pereira, R., Hedley, M., Bishop, P., & Camps Arbestain, M. (2013). High-ash biochar from biosolids increases carbon and nitrogen storage in low fertility pasture soils. Poster session presented at the meeting of New Zealand 2013 Biochar Workshop. The final answer?. Palmerston North, New Zealand
[Conference Poster]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M.
Calvelo Pereira, R., Muetzel, S., Camps Arbestain, M., Bishop, P., Hina, K., & Hedley, M. (2013, July). Assessment of the influence of biochar on rumen fermentation: A laboratory-scale experiment. Presented at New Zealand 2013 Biochar Workshop. The final answer?. Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M.
Christiansen, L., Hanly, J., Jha, N., Saggar, S., & Hedley, M. (2013). Denitrification bioreactor nitrous oxide emissions under fluctuating flow conditions. American Society of Agricultural and Biological Engineers Annual International Meeting 2013, ASABE 2013. Vol. 4 (pp. 2861 - 2867).
[Conference Paper in Published Proceedings]Authored by: Hanly, J., Hedley, M., Jha, N., Saggar, S.
Pullanagari, R., Yule, IJ., Tuohy, MP., & Hedley, M. (2012). Proximal sensing tools to estimate pasture quality parameters. Proceedings of 11th International Conference on Precision Agriculture. : 11th International Conference on Precision Agriculture
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Pullanagari, R., Tuohy, M., Yule, I.
Calvelo Pereira, R., Wisnubroto, E., Hedley, M., Camps Arbestain, M., Green, S., Saggar, S., . . . Deurer, M. (2012). Biochar as a catalyst for soil carbon sink enhancement: A lysimeter study. Poster session presented at the meeting of Eurosoil 2012 Soil Science for the benefit of mankind and environment. 4th International Congress of the European Confederation Of Soil Science Societies (ECSSS). Bari, Italy
[Conference Poster]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M., Saggar, S.
Calvelo Pereira, R., Wisnubroto, E., Hedley, M., Camps Arbestain, M., Green, S., Saggar, S., . . . Deurer, M. (2012, February). Biochar in pasture soils: effect in yield and nutrients. Presented at New Zealand 2012 Biochar Workshop. From Science to stakeholders. Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M., Saggar, S.
Christensen, CL., Hedley, MJ., Hanly, JA., & Horne, DJ. (2012). Three years of duration-controlled grazing: What have we found?. In LD. Currie, & CL. Christensen (Eds.) Advanced Nutrient Management: Gains from the Past - Goals for the Future.. (pp. 1 - 8). Palmerston North, New Zealand: Fertilizer and Lime Research Centre Annual Workshop
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.
Christensen, CL., Hedley, MJ., Hanly, JA., & Horne, DJ. (2012). Nitrogen loss mitigation using duration-controlled grazing: Field observations compared to modelled outputs. Proceedings of the New Zealand Grasslands Association. Vol. 74 (pp. 115 - 119). : New Zealand Grassland Association 74
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.
Christensen, CL., Hedley, MJ., Hanly, JA., & Horne, DJ. (2012). Potassium cycling and the practice of standing cows off: Risks and opportunities. In LL. Burkitt, & L. Sparrow (Eds.) Proceedings of the 5th Joint Australian and New Zealand Soil Science Conference. (pp. 469 - 472). : 5th Joint Australian and New Zealand Soil Science Confernce
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hedley, M., Horne, D.
Christensen, CL., Hedley, MJ., Hanly, JA., & Horne, DJ.(2012, November). Nitrogen loss mitigation using duration-controlled grazing: Field observations compared to modelled outputs. PROCEEDINGS OF THE NEW ZEALAND GRASSLAND ASSOCIATION, VOL 74. (pp. 115 - 119). 0369-3902.
[Conference]Authored by: Christensen, C., Hedley, M., Horne, D.
Hanly, JA., Horne, DJ., Pratt, C., & Hedley, MJ.Weathered andesitic tephra as an active filter substrate for removing phosphorus from wastewaters.. In H. Wang (Ed.): Land Treatment Collective Conference
[Conference Paper in Published Proceedings]Authored by: Hanly, J., Hedley, M., Horne, D.
Christianson, L., Hedley, M., Camps Arbestain, M., Free, H., & Saggar, S. (2011). Influence of biochar amendments on denitrification bioreactor performance. Poster session presented at the meeting of New Zealand Biochar Research Centre Workshop 2011. Massey University, Palmerston North, New Zealand
[Conference Poster]Authored by: Camps Arbestain, M., Hedley, M.
Wisnubroto, E., Hedley, M., & Camps Arbestain, M. (2011). The use of biochar from biosolids to improve soil functions of sandy soils. Poster session presented at the meeting of New Zealand Biochar Research Centre Workshop 2011. Massey University, Palmerston North, New Zealand
[Conference Poster]Authored by: Camps Arbestain, M., Hedley, M.
Wisnubroto, E., Ball, C., Gardine, K., Hedley, M., Green, S., Camps Arbestain, M., . . . Deurer, M. (2011). Mitigating climate change by soil carbon sink enhancement including biochar: A lysimeter study. Poster session presented at the meeting of NZBRC Workshop 2011. Massey University, Palmerston North, New Zealand
[Conference Poster]Authored by: Camps Arbestain, M., Hedley, M.
Camps Arbestain, M., & Hedley, M. (2011, February). On-going and future research activities at the soil science stream of the NZBRC. Presented at New Zealand Biochar Research Centre Workshop 2011. Massey University, Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Camps Arbestain, M., Hedley, M.
Hina, K., Hedley, M., Hanly, J., Camps Arbestain, M., & Bretherton, M. (2011). Investigations into the effects of post pyrolysis treatments on adsorption properties of biochar. Poster session presented at the meeting of New Zealand Biochar Research Centre Workshop 2011. Massey University, Palmerston North, New Zealand
[Conference Poster]Authored by: Bretherton, M., Camps Arbestain, M., Hanly, J., Hedley, M.
Free, H., Hedley, M., & Camps Arbestain, M. (2011, February). Investigation of microorganisms (from charcoal-rich and -poor environments) growing in the presence of pine biochar. Presented at New Zealand Biochar Research Centre Workshop 2011. Massey University, Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Camps Arbestain, M., Hedley, M.
Herath, H., Camps Arbestain, M., Hedley, M., & Deurer, M. (2011, February). Effect of different types and doses of biochars on the water retention capacity of a typic Fragiaqualf and a typic Hapludand. Presented at New Zealand Biochar Research Centre Workshop 2011. Massey University, Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Camps Arbestain, M., Hedley, M.
Herath, H., Camps Arbestain, M., & Hedley, M. (2011, February). Mineralisation of carbon from fresh and carbonised corn stover in two New Zealand soils. Presented at New Zealand Biochar Research Centre Workshop 2011. Massey University, Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Camps Arbestain, M., Hedley, M.
Wang, T., Camps Arbestain, M., Hedley, M., & Bishop, P. (2011, February). Methodologies for determining the P and N fertility values of biochar. Presented at New Zealand Biochar Research Centre Workshop 2011. Massey University, Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Camps Arbestain, M., Hedley, M.
Calvelo Pereira, R., Kaal, J., Camps Arbestain, M., Lorenzo, R., Aitkenhead, W., Hedley, M., . . . Macia Agullo, J. (2011, February). Methodologies for determining the labile fraction of carbon in biochar. Presented at New Zealand Biochar Research Centre Workshop 2011. Massey University, Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M., Hindmarsh, J.
Draganova, IG., Yule, I., Hedley, M., Betteridge, K., & Stafford, K. (2010). Monitoring Dairy Cow Activity With GPS-tracking And Supporting Technologies.. : 9th International Conference on Precision Agriculture
[Conference Paper in Published Proceedings]Authored by: Draganova, I., Hedley, M., Stafford, K., Yule, I.
Hanly, JA., Horne, DJ., & Hedley, MJ.Sustainable Systems for Land Treatment of Farm Dairy Effluent. Part 2: Tools for management.. In H. Wang (Ed.): Land Treatment Collective Conference
[Conference Paper in Published Proceedings]Authored by: Hanly, J., Hedley, M., Horne, D.
Hedley, MJ., Furness, H., & Fick, J. (2010). Outlook for Long-Term Fertilizer Demand ans Aspects of Organic P Recycling in New Zealand. In P. Heffer (Ed.)Paris: IFA Crossroads Asia-Pacific Conference
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Draganova, I., Yule, IJ., & Hedley, M. (2010). Monitoring Dairy Cow Activity with GPS-Tracking and Supporting Technologies. Paper 143 Available on Conference CD.. Vol. Version 1.1Denver, Colorado, USA: 10th International Conference on Precision Dairy Agriculture
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Draganova, I., Yule, IJ., Betteridge, K., Hedley, M., Stevenson, M., & Stafford, K. (2010). Activity Patterns and Nutrient Redistribution in Intensively Managed Dairy Herd.. In LD. Currie, & C. Christensen (Eds.) Farming's Future: Minimising Footprints and Maximising Margins. Vol. Occasional Report No. 23. (pp. 398 - 404). Massey University, Palmerston North.: 23rd Annual FLRC Workshop
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Schon, N., Minor, MA., Mackay, A., Yeates, G., & Hedley, M. (2010). A soil invertebrate indicator for New Zealand pastoral soils.. In RJ. Gilkes, & . Nattaporn Prakongkep (Eds.) Proceedings of the 19th World Congress of Soil Science. Soil Solutions for a Changing World.. (pp. 49 - 52). : Soil Solutions for a Changing World: 19th World Congress of Soil Science
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Minor, M.
Kusumo, BH., Hedley, MJ., Tuohy, MP., Hedley, CB., & Arnold, GC.(2008). Predicting Soil Carbon and Nitrogen Concentrations and Pasture Root Densities from Proximally Sensed Soil Spectral Reflectance. PROXIMAL SOIL SENSING. (pp. 177 - 190).
[Conference]Authored by: Hedley, M., Tuohy, M.
Christensen, C., Hanly, J., Hedley, M., & Horne, D. (2010). Using duration-controlled grazing to reduce nitrate leaching from dairy farms. Farming's Future: Minimising Footprints and Maximising Margins. 23rd Annual Workshop: Fertilizer and Lime Research Centre. (pp. 46 - 53).
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.
Christensen, C., Hanly, J., Hedley, M., & Horne, D. (2010). Reducing nitrate leaching losses by using duration-controlled grazing of dairy cows. Soil solutions for a changing world: 19th World Congress of Soil Science. (pp. 1 - 4).
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.
Christensen, C., Hanly, J., Hedley, M., & Horne, D. (2010). Reducing nitrate leaching losses by using duration-controlled grazing of dairy cows. Poster session presented at the meeting of Soil solutions for a changing world: 19th World Congress of Soil Science. Brisbane, QLD, Australia
[Conference Poster]Authored by: Christensen, C., Hedley, M., Horne, D.
Hina, K., Bishop, PA., Camps Arbestain, M., Calvelo Pereira, R., Macia Agullo, J., Hindmarsh, JP., . . . Hedley, MJ. (2010). Producing biochars with enhanced surface activity through alkaline pretreatment of feedstocks. Poster session presented at the meeting of New Zealand Biochar Research Centre (NZBRC) Workshop 2010: Opportunities for New Zealand Stakeholders. Palmerston North, New Zealand
[Conference Poster]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hanly, J., Hedley, M., Hindmarsh, J.
Calvelo Pereira, R., Lorenzo, R., Aitkenhead, WP., Macias, F., Hedley, MJ., Macia Agullo, J., . . . Camps Arbestain, M. (2010). Influence of pyrolysis temperature on heterotrophic basal soil respiration in biochar/soil mixtures. Poster session presented at the meeting of New Zealand Biochar Research Centre (NZBRC) Workshop 2010: Opportunities for New Zealand Stakeholders. Palmerston North, New Zealand
[Conference Poster]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M.
Wisnubroto, EI., Hedley, MJ., Hina, K., & Camps Arbestain, M. (2010). The use of biochar from biosolids on Waitarere sandy soils: Effects on the growth of rye grass. Poster session presented at the meeting of New Zealand Biochar Research Centre (NZBRC) Workshop. Palmerston North, New Zealand
[Conference Poster]Authored by: Camps Arbestain, M., Hedley, M.
Camps Arbestain, M., Calvelo Pereira, R., Lorenzo, R., Aitkenhead, WP., Macias, F., Hedley, MJ., . . . Macia Agullo, J. (2010, September). Contribution to the characterization of biochars for the prediction of their carbon longevity. Presented at Third Conference of the International Biochar Initiative. Rio de Janeiro, Brazil.
[Conference Oral Presentation]Authored by: Calvelo Pereira, R., Camps Arbestain, M., Hedley, M.
Wisnubroto, EI., Hedley, MJ., Hina, K., & Camps Arbestain, M. (2010). The use of biochar from biosolids on Waitarere sandy soils: Effects on the growth of rye grass. In New Zealand Biochar Research Centre (NZBRC) Workshop 2010: Opportunities for New Zealand Stakeholders(pp. 40 - 40). : New Zealand Biochar Research Centre (NZBRC) Workshop 2010
[Conference Abstract]Authored by: Camps Arbestain, M., Hedley, M.
Hina, K., Bishop, PA., Camps Arbestain, M., Pereira, RC., Macia Agullo, J., Hindmarsh, JP., . . . Hedley, MJ. (2010). Producing biochars with enhanced surface activity through alkaline pretreatment of feedstocks. In New Zealand Biochar Research Centre (NZBRC) Workshop 2010: Opportunities for New Zealand Stakeholders(pp. 39 - 39). : New Zealand Biochar Research Centre (NZBRC) Workshop 2010
[Conference Abstract]Authored by: Camps Arbestain, M., Hanly, J., Hedley, M., Hindmarsh, J.
Pereira, RC., Lorenzo, R., Aitkenhead, WP., Macias, F., Hedley, MJ., Macia Agullo, J., . . . Camps Arbestain, M. (2010). Influence of pyrolysis temperature on heterotrophic basal soil respiration in biochar/soil mixtures. In New Zealand Biochar Research Centre (NZBRC) Workshop 2010: Opportunities for New Zealand Stakeholders 2010(pp. 41 - 41). : New Zealand Biochar Research Centre (NZBRC) Workshop 2010
[Conference Abstract]Authored by: Camps Arbestain, M., Hedley, M.
Camps Arbestain, M., Bishop, PA., Wisnubroto, EI., Hina, K., Aitkenhead, WP., Pereira, RC., . . . Hedley, MJ. (2010). Biochar research at the NZBRC. The soil science stream. In New Zealand Biochar Research Centre (NZBRC) Workshop 2010: Opportunities for New Zealand Stakeholders(pp. 23 - 23). : New Zealand Biochar Research Centre (NZBRC) Workshop 2010
[Conference Abstract]Authored by: Camps Arbestain, M., Hedley, M.
Hanly, JA., Horne, DJ., & Hedley, MJ. (2009). Use of remote sensing to assess travelling effluent-irrigator performance on a dairy farm in New Zealand. Poster session presented at the meeting of Annual Symposium on Precision Agriculture in Australasia. Armidale, NSW, Australia
[Conference Poster]Authored by: Hanly, J., Hedley, M., Horne, D.
Christensen, C., Hanly, J., Hedley, M., & Horne, D. (2009). Controlling nitrogen and phosphorus loss from dairy farms using restricted grazing practices. Nutrient Management in a Rapidly Changing World: Fertilizer and Lime Research Centre Workshop. (pp. 295 - 304).
[Conference Paper in Published Proceedings]Authored by: Christensen, C., Hanly, J., Hedley, M., Horne, D.
Camps Arbestain, M., Rowarth, JS., Bishop, PA., Aitkenhead, WP., Free, HF., Hindmarsh, JP., . . . Hedley, MJ. (2009). The New Zealand Biochar Research Centre: Firmly walking on the 'ground'. In 1st Asia Pacific Biochar Conference 2009(pp. 98 - 99). : NSW Department of Primary Industries
[Conference Abstract]Authored by: Camps Arbestain, M., Hedley, M., Hindmarsh, J., McGill, C.
Aitkenhead, WP., Hindmarsh, JP., Camps Arbestain, M., & Hedley, MJ. (2009). All chars are different: Detailed characterisation of Biochars obtained from NZ feedstocks at different pyrolysis temperatures. Poster session presented at the meeting of 1st Asia Pacific Biochar Conference. Gold Coast, QLD, Australia
[Conference Poster]Authored by: Camps Arbestain, M., Hedley, M., Hindmarsh, J.
Aitkenhead, WP., Hindmarsh, JP., Camps Arbestain, M., & Hedley, MJ. (2009). Detailed characterisation of biochars obtained from New Zealand feedstocks at different pyrolysis temperatures. In 1st Asia Pacific Biochar Conference 2009(pp. 36 - 37). : NSW Department of Primary Industries
[Conference Abstract]Authored by: Camps Arbestain, M., Hedley, M., Hindmarsh, J.
Davies, CE., Camps Arbestain, M., & Hedley, MJ. (2009). Engineering challenges and opportunities in the manufacture of biochar. In 7th Asia Pacific Conference on Sustainable Energy and Environmental Technologies 2009: China University of Petroleum
[Conference Abstract]Authored by: Camps Arbestain, M., Davies, C., Hedley, M.
Free, HF., McGill, CR., Rowarth, JS., Camps Arbestain, M., & Hedley, MJ. (2009). The effect of biochars on maize (Zea mays) germination. Poster session presented at the meeting of 1st Asia Pacific Biochar Conference. Gold Coast, QLD
[Conference Poster]Authored by: Camps Arbestain, M., Hedley, M., McGill, C.
Free, HF., McGill, CR., Rowarth, JS., & Hedley, MJ. (2009). The effects of biochars on maize (Zea mays) germination. In 1st Asia Pacific Biochar Conference(pp. 83 - 83). : NSW Department of Primary Industries
[Conference Abstract]Authored by: Hedley, M., McGill, C.
Draganova, IG., Yule, I., Betteridge, K., Hedley, M., & Stafford, K. (2009). Pasture utilisation and nutrient redistribution in intensively managed dairy systems. In Proceedings of the 13th Annual Symposium on Precision Agriculture in Australasia(pp. 65 - 65). , 13th Annual Symposium on Precision Agriculture in Australasia Australia: University of New England
[Conference Abstract]Authored by: Hedley, M., Stafford, K.
Horne, DJ., Hanly, JA., & Hedley, MJ. (2008, December). Implementing deferred dairy effluent irrigation: new technologies. Presented at New Zealand/Australia Soil Science Society Conference. Massey University, Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Hanly, J., Hedley, M., Horne, D.
Hanly, JA., Hedley, MJ., & Horne, DJ. (2008, December). Effect of a summer forage crop on nitrogen losses in drainage from a dairy farm. Presented at New Zealand/Australia Soil Science Society Conference. Massey University, Palmerston North, New Zealand.
[Conference Oral Presentation]Authored by: Hanly, J., Hedley, M., Horne, D.
Kusumo, BH., Hedley, CB., Hedley, MJ., Hueni, A., Tuohy, MP., & Arnold, GC.The use of diffuse reflectance spectroscopy for in situ carbon and nitrogen analysis of pastoral soils. Australian Journal of Soil Research. 46 (6-7)(pp. 623 - 635). 0004-9573.
[Conference]Authored by: Hedley, M., Tuohy, M.
Yates, LJ., & Hedley, MJ.Understanding winter sodium deposition in Taranaki, New Zealand. Australian Journal of Soil Research. 46 (6-7)(pp. 600 - 609). 0004-9573.
[Conference]Authored by: Hedley, M.
Schon, NL., MacKay, A., Yeates, GW., Hedley, MJ., & Minor, MA. (2008, December). Towards an invertebrate-based index of soil function for pastoral soils in New Zealand. Presented at Soils 2008, The Living Skin of Planet Earth. Massey University, Palmerston North, NZ.
[Conference Oral Presentation]Authored by: Hedley, M., Minor, M.
Schon, NL., Yeates, GW., MacKay, A., Hedley, MJ., & Minor, MA. (2008, August). Towards an invertebrate-based index of soil health for pastoral soils in New Zealand. Presented at 15th International Colloquium on Soil Zoology. Parana, Brazil.
[Conference Oral Presentation]Authored by: Hedley, M., Minor, M.
Pigneri, A., & Hedley, MJ. (2008). Understanding the role of biological carbon sequestration in soils: The Massey University Biochar initiative. In Carbon Workshop: Global Cycle to Regional Budget(pp. 1 - 2). : NIWA
[Conference Abstract]Authored by: Hedley, M.
Bishop, PA., Liu, HY., Hedley, MJ., & Loganathan, P. (2008). New Zealand made controlled release coated urea increases winter growth rates of Italian ryegrass with lower N leaching than uncoated urea. Proceedings of the New Zealand Grassland Association [Vol 70]. (pp. 85 - 89).
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Tillman, RW., Horne, DJ., Hedley, MJ., Yates, LJ., & Hanley, JA. (2008). Is 'environment efficiency' a useful concept in improving and regulating the environment performance of pastrol farming systems?. Proceedings of the Workshop Carbon and Nutrient Management in Agriculture.. (pp. 531 - 538).
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Horne, D.
Kusumo, BH., Hedley, MJ., Tuohy, MP., Hedley, CB., & Arnold, GC. (2008). Predicting soil carbon and nitrogen concentrations and pasture root densities from proximally sensed spectral reflectance. Proceedings of the 1st Global Workshop on High Resolution Digital Soil Sensing and Mapping. (pp. unpaged - 12).
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Tuohy, M.
Hedley, MJ., Loganathan, P., & Grace, ND. (2007). Fertiliser-Derived Fluorine in Grazed Pasture Systems. 24p. : Australian Fertilizer Industry Conference 2007
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Hedley, CB., Kusumo, BH., Sanches, ID., Hedley, MJ., Tuohy, MP., & Hawke, M. (2007). Proximal sensing of soil and pasture development under "forest to farm" land use change. In LD. Currie, & LJ. Yates (Eds.) Proceedings of the Workshop - Designing Sustainable Farms: Critical Aspects of Soil and Water Management. (pp. 158 - 169).
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Tuohy, M.
Wang, HL., Bolan, N., Hedley, M., & Horne, D.Potential uses of fluidised bed boiler ash (FBA) as a liming material, soil conditioner and sulfur fertilizer. COAL COMBUSTION BYPRODUCTS AND ENVIRONMENTAL ISSUES. (pp. 202 - +).
[Conference]Authored by: Hedley, M.
Hedley, MJ., & Trolove, S. (2006, July). Can plants deliver food, fibre and solutions for anthropogenic soil phosphate problems?. Presented at 18th World Congress of Soil Science. Philadelphia, PA.
[Conference Oral Presentation]Authored by: Hedley, M.
Hedley, MJ., & Trolove, S. (2006). Can plants deliver food, fibre and solutions for anthropogenic soil phosphate problems?. In 18th World Congress of Soil Science: [online]
[Conference Abstract]Authored by: Hedley, M.
Woutersen, N., Mackay, A., Minor, MA., Yeates, GW., & Hedley, MJ. (2006, November). The response of soil biological communities to different fertiliser regimes. Presented at New Zealand Society of Soil Science Conference. Rotorua, NZ.
[Conference Oral Presentation]Authored by: Hedley, M., Minor, M.
Hoogeveen, N., Hedley, MJ., McRae, A., Valentine, I., Gray, DI., & Tillman, RW. (2006). Estimating 'grandparented' nitrogen discharge allowances for sheep and beef farms in the Lake Taupo catchment: A case study analysis of the process and some implications. In LD. Currie, & JA. Hanly (Eds.) Implementing Sustainable Nutrient Management Strategies in Agriculture: Proceedings of the 19th Annual Workshop. (pp. 92 - 104).
[Conference Paper in Published Proceedings]Authored by: Gray, D., Hedley, M.
Hanly, JA., Hedley, MJ., & Horne, DJ. (2006, November). Removing phosphorus from dairy farm drainage water using volcanic gravel. Presented at New Zealand Society of Soil Science Conference. Rotorua, NZ.
[Conference Oral Presentation]Authored by: Hanly, J., Hedley, M., Horne, D.
Sanches, ID., Tuohy, MP., & Hedley, MJ. (2006). Measuring pasture biomass with a spectroradiometer. Poster session presented at the meeting of 13th Australasian Remote Sensing and Photogrammetry Conference. Canberra, ACT
[Conference Poster]Authored by: Hedley, M., Tuohy, M.
Loganathan, P., Bretherton, MR., & Hedley, MJ. (2006). Effect of soil cultivation and winter pugging on fluorine distribution in soil profiles under pasture following phosphate fertiliser application. Poster session presented at the meeting of New Zealand Society of Soil Science Conference. Rotorua, NZ
[Conference Poster]Authored by: Bretherton, M., Hedley, M.
Loganathan, P., Bretherton, MR., & Hedley, MJ. (2006). Effect of soil cultivation and winter pugging on fluorine distribution in soil profiles under pasture following phosphate fertiliser application. In New Zealand Society of Soil Science Conference(pp. 61). : New Zealand Society of Soil Science
[Conference Abstract]Authored by: Bretherton, M., Hedley, M.
Loganathan, P., Hedley, MJ., & Bolan, NS. (2006, January). Accumulation and dynamics of fertilizer-derived cadmium and fluoride in grazed pastoral soils. Presented at 14th World Fertilizer Congress. Chiang Mai, Thailand.
[Conference Oral Presentation]Authored by: Hedley, M.
Loganathan, P., Hedley, MJ., & Bolan, NS. (2006). Accumulation and dynamics of fertilizer-derived cadmium and fluoride in grazed pastoral soils. In 14th World Fertilizer Congress(pp. 103). : Land Development Department / Soil and Water Conservation Society of Thailand
[Conference Abstract]Authored by: Hedley, M.
Loganathan, P., Liu, Q., Hedley, MJ., & Gray, CW. (2006). Chemical fractionation of fluorine in soils with long-term phosphate fertiliser history. Poster session presented at the meeting of Australian Society of Soil Science Incorporated (ASSSI)-Australasian Soil and Plant Analysis Council (ASPAC) Joint National Soils Conference: Soil Science Solving Problems. University of Adelaide, SA
[Conference Poster]Authored by: Hedley, M.
Loganathan, P., Liu, Q., Hedley, MJ., & Gray, CW. (2006). Chemical fractionation of fluorine in soils with long-term phosphate fertiliser history. In Australian Society of Soil Science Incorporated (ASSSI)-Australasian Soil and Plant Analysis Council (ASPAC) Joint National Soils Conference: Soil Science Solving Problems(pp. 46). : ASSSI / ASPAC
[Conference Abstract]Authored by: Hedley, M.
Yule, IJ., Murray, RI., Irwin, ME., Hedley, MJ., & Jones, JR. (2005). Variable-rate application technology for aerial topdressing aircraft. ASAE Meeting. (pp. 1 - 9).
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Irwin, M., Jones, J.
Yule, IJ., Murray, RI., Irwin, ME., Hedley, MJ., & Jones, JR. (2005). Variable-rate application technology for aerial topdressing aircraft. (pp. unpaged). , American Society of Agricultural Engineers Annual International Meeting St. Joseph, MI: American Society of Agricultural Engineers
[Conference Abstract]Authored by: Hedley, M., Irwin, M., Jones, J.
Yule, IJ., Murray, RI., Irwin, M., Hedley, M., & Jones, J.Variable-rate application technology for aerial topdressing aircraft.
[Conference Oral Presentation]Authored by: Hedley, M., Irwin, M., Jones, J.
Lawrence, H., Yule, I., Jones, J., & Hedley, M. (2005). Testing the viability of existing ground spread fertiliser spreaders to perform variable rate fertilisation. Precision Agriculture 2005, ECPA 2005. (pp. 655 - 663).
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Jones, J.
Houlbrooke, DJ., Hanly, JA., Horne, DJ., & Hedley, MJ. (2005). Nitrogen losses in artificial drainage and surface runoff from pasture following grazing by dairy cattle. In RI. Acworth, G. Macky, & NPM. Eds (Eds.) New Zealand Hydrological Society-International Association of Hydrogeologists-New Zealand Society of Soil Science 2005 Conference: Where waters meet. (pp. 1 - 8). Wellington, NZ
[Conference Paper in Published Proceedings]Authored by: Hanly, J., Hedley, M., Horne, D.
Hanly, JA., Hedley, MJ., Horne, DJ., & Monaghan, R. (2005). New generation solutions for capturing phosphosus from drainage waters. Poster session presented at the meeting of New Zealand Hydrological Society/ International Association of Hydrogeologists/ New Zealand Society of Soil Science 2005 conference. Auckland, NZ
[Conference Poster]Authored by: Hanly, J., Hedley, M.
Loganathan, L., Hedley, MJ., Grace, ND., & Cronin, SJ. (2005). Fluorine accumulation in soils and its potential risk of chronic fluorosis to grazing ruminants. 2nd International Congress of Chemistry and Environment. (pp. 306 - 310). Indore, India: 2nd International Congress of Chemistry and Environment
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Hedley, MJ., Hanly, JA., Horne, DJ., Houlbrooke, DJ., Bretherton, MR., & Snow, VO. (2005). Storage and deferred irrigation of farm dairy effluent: Critical components of environmentally responsible dairying. In LD. Currie, & JAH. Eds (Eds.) 18th Annual Workshop: Developments in Fertiliser Application Technologies and Nutrient Management. (pp. 114 - 122). Palmerston North, NZ
[Conference Paper in Published Proceedings]Authored by: Bretherton, M., Hanly, J., Hedley, M., Horne, D.
Hedley, MJ., Hanly, JA., Horne, DJ., & Bretherton, MR. (2005). New generation solutions for capturing nutrients from drainage waters. In Dairy3 Triple the Know-How Vol. 3 (pp. 85 - 86). , 3rd Dairy Conference: Massey University Dairyfarming Annual Dexcel's Ruakura Dairyfarmers' Conference Palmerston North, NZ: College of Sciences, Massey University
[Conference Abstract]Authored by: Bretherton, M., Hanly, J., Hedley, M., Horne, D.
Hedley, MJ., Horne, DJ., Hanly, JA., Connolly, JH., Ionas, G., Collins, R., . . . Donnison, A. (2005). Pathogen movement from grazed dairy pastures via runoff and drainage. (pp. 78 - 78). , New Zealand Hydrological Society/ International Association of Hydrogeologists/ New Zealand Society of Soil Science Wellington, NZ: New Zealand Hydrological Society (In Press)
[Conference Abstract]Authored by: Hanly, J., Hedley, M., Horne, D.
Hedley, MJ. (2004, December). Soil management workshop in farming and horticulture. Presented at Primary Industry Polytechnic Industry Association Conference. Waiariki Instiute of Technology, Rotorua, NZ.
[Conference Oral Presentation]Authored by: Hedley, M.
Yule, IJ., Murray, RI., Lawrence, H., Hedley, MJ., & Jones, JR. (2004, August). Precision fertiliser application from land and air. Presented at 8th Annual Symposium on Precision Agriculture Research and Application in Australasia. University of Sydney, Sydney, NSW.
[Conference Oral Presentation]Authored by: Hedley, M., Jones, J.
Hedley, MJ., Houlbrooke, DJ., Horne, DJ., & Hanly, JA. (2004). Land treatment of farm dairy effluent in New Zealand: Nutrients and pathogenic organisms. The 2004 Obihiro Asia and the Pacific Seminar on Education for Rural Development (OASERD): Global perspective on livestock waste management. (pp. 51 - 60). Obihiro, Japan
[Conference Paper in Published Proceedings]Authored by: Hanly, J., Hedley, M., Horne, D.
Houlbrooke, DJ., Hanly, JA., Horne, DJ., & Hedley, MJ. (2004). Nitrogen losses in artificial drainage and surface runoff from pasture following grazing by dairy cattle. 3rd Australian New Zealand Soils Conference: SuperSoil 2004. (pp. 1 - 8). www.regional.org.au/au/asssi/
[Conference Paper in Published Proceedings]Authored by: Hanly, J., Hedley, M., Horne, D.
Houlbrooke, DJ., Hanly, JA., Horne, DJ., & Hedley, MJ. (2004, December). Nitrogen losses in artificial drainage and surface runoff from pasture following grazing by dairy cattle. Presented at 3rd Australian/New Zealand Soils Conference. University of Sydney, Sydney, NSW.
[Conference Oral Presentation]Authored by: Hanly, J., Hedley, M., Horne, D.
Houlbrooke, DJ., Horne, DJ., Hedley, MJ., Hanly, JA., & Snow, VO. (2003). The impact of intensive dairy farming on the leaching losses of nitrogen and phosphourus from a mole and pipe drained soil. In Proceedings of the New Zealand Grassland Association Vol. 65 (pp. 179 - 184).
[Conference Abstract]Authored by: Hedley, M., Horne, D.
Hanly, JA., Houlbrooke, DJ., Horne, DJ., & Hedley, MJ. (2003). Techiques and tools for determining nutrient and pathogen transfer in artificial drainage and runoff from dairy pasture. In LD. Currie, & JA. Hanly (Eds.) Tools for Nutrient and Pollutant Management: Applications to Agriculture and Environmental Quality; Applications to agriculture and environmental quality: Proceedings of the 17th Annual Workshop held by the Fertilizer and Lime Research Centre Massey. (pp. 129 - 138). Palmerston North NZ
[Conference Paper in Published Proceedings]Authored by: Hanly, J., Hedley, M., Horne, D.
Houlbrooke, DJ., Horne, DJ., Hedley, MJ., Hanly, JA., Scotter, D., & Snow, VO. (2003). Using the pasture-soil system to filter nutrients from farm dairy effluent. 16th Annual Workshop: Environmental Management Using Soil-Plant Systems. Vol. 16 (pp. 225). Palmerston North, NZ
[Conference Paper in Published Proceedings]Authored by: Hanly, J., Hedley, M., Horne, D.
Hedley, MJ., Hill, R., & Hill, G. (2002). Soil tests and environmental codes of practice. In LD. Currie, & P. Loganathan (Eds.) 15th Annual Workshop of the Fertilizer and Lime Research Centre in conjunction with the 27th Technical Conference of the Fertiliser Manufacturers' Research Association. Vol. 15 (pp. 363 - 371). Palmerston North, NZ
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Horne, DJ., Hedley, MJ., Houlbrooke, DJ., Furkert, IF., Hanly, JA., & Toes, BB. (2002). Sustainable land treatment of dairy shed effluent on artificially drained soils: the deferred irrigation project. 15th Annual Workshop: Dairy Farm Soil Management. Vol. 15 (pp. 269 - 281). Palmerston North, NZ
[Conference Paper in Published Proceedings]Authored by: Furkert, I., Hanly, J., Hedley, M., Horne, D., Toes, H.
Woolley, DJ., Liao, MT., Hedley, MJ., Brooks, RR., & Nichols, A. (2001). Agronomic effectiveness of selected fertilisers in supplying copper to perennial ryegrass. Australian Society of Agronomy. (pp. [unpaged]). : Proceedings of the 10th Australian Agronomy Conference 2001
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Cronin, SJ., Loganathan, P., Hedley, MJ., Neall, VE., & Lecointre, JA. (2001). Toxicity of fluoride to grazing animals in tephras from the 1995 and 1996 Ruapehu tephra eruptions. In Institute of Geological & Nuclear Sciences information series ; no. 49(pp. 24 - 24). , Proceedings of the Cities on Volcanoes 2 Conference Lower Hutt, NZ: Institute of Geological and Nuclear Sciences
[Conference Abstract]Authored by: Hedley, M.
Cronin, SJ., Loganathan, L., Hedley, MJ., Neall, VE., & Lecointre, JA. (2001, February). Toxicity of fluoride to grazing animals in tephras from the 1995-1996 Ruapehu tephra eruptions. Presented at Cities on Volcanoes 2. Auckland, NZ.
[Conference Oral Presentation]Authored by: Hedley, M.
Hedley, MJ., & Bolan, NS. (2003). Key outputs from reactive phosphate rock research in New Zealand. In SSS. Rajan, & SH. Chien (Eds.) DIRECT APPLICATION OF PHOSPHATE ROCK AND RELATED APPROPRIATE TECHNOLOGY-LATEST DEVELOPMENTS AND PRACTICAL EXPERIENCES, PROCEEDINGS. (pp. 177 - 193). : International Meeting on Direct Application of Phosphate Rock and Related Appropriate Technology-Latest Developments and Practical Experience
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Liao, MT., Hedley, MJ., Woolley, DJ., Brooks, RR., & Nichols, MA. (2000). Evidence of copper redistribution within tomato plants. Soil 2000: New Horizons for a New Century: Australian and New Zealand Second Joint Conference. Vol. 3 (pp. 113 - 114). Lincoln University, Canterbury, NZ
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Liao, MT., Hedley, MJ., Woolley, DJ., Loganathan, P., Brooks, RR., & Nichols, MA. (2000). Knowledge to explain the ''unexplainable'' Cu uptake by plants from copper-fertilised soils. In LD. Currie, & P. Loganathan (Eds.) Proceedings of the Workshop Soil Research: A Knowledge Industry for Land-based Exporters. Vol. Occasional (pp. 279 - 289). Palmerston North, NZ
[Conference Paper in Published Proceedings]Authored by: Hedley, M.
Yule, IJ., Tuohy, MP., Gillingham, AG., Praat, JP., & Hedley, MJ. (2000). Precision agriculture applications in New Zealand. In LD. Currie, & PL. Eds (Eds.) Soil Research: A Knowledge Industry for Land-based Exporters. (pp. 69 - 77). Palmerston North, NZ
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Tuohy, M.
Moir, JL., Scotter, DR., Hedley, MJ., Mackay, AD., Tillman, RW., Turner, MA., . . . Horne, DJ. (2000). Adding value to soil fertility - pasture growth relationships with a water balance. In LD. Currie, & PL. Eds (Eds.) Soil Research: A Knowledge Industry for Land-based Exporters. Vol. 13 (pp. 225 - 239). Palmerston North, NZ
[Conference Paper in Published Proceedings]Authored by: Hedley, M., Horne, D.
Hedley, MJ., & Bolan, NS.Developments in some aspects of reactive phosphate rock research and use in New Zealand. Australian Journal of Experimental Agriculture. 37 (8)(pp. 861 - 884). 0816-1089.
[Conference]Authored by: Hedley, M.
BOLAN, NS., HEDLEY, MJ., & WHITE, RE.(1990, June). PROCESSES OF SOIL ACIDIFICATION DURING NITROGEN CYCLING WITH EMPHASIS ON LEGUME BASED PASTURES. PLANT-SOIL INTERACTIONS AT LOW PH. (pp. 169 - 179).
[Conference]Authored by: Hedley, M.

Other

Singh, R., Horne, DJ., Morgenstern, U., McMillian, A., Matthews, A., Roygard, J., . . . Hedley, M. (2017, April). Benign de-nitrification in the subsurface environment. Presented at Lincoln University, Christchurch, New Zealand.
[Oral Presentation]Authored by: Hedley, M., Horne, D., Singh, R.
Rowarth, JS., Camps Arbestain, M., & Hedley, MJ. (2009). Biochar - stable soil carbon. (pp. 2 - 4). New Zealand Grassland Association
[Other]Authored by: Camps Arbestain, M., Hedley, M.

Consultancy and Languages

Languages

  • English
    Last used: 1
    Spoken ability: Excellent
    Written ability: Excellent

Supervision and Teaching

Summary of Doctoral Supervision

Position Current Completed
Supervisor 3 17
Co-supervisor 4 18

Teaching

Biogeochemical cycles in grazed pasture systems including impact of farming systems on the soil carbon, nitrogen potassium and phosphate cycles.

Current Doctoral Supervision

Supervisor of:

  • Akinson Tumbure - Doctor of Philosophy
    Studies in the improvement of Dorowa Phosphate rock's argronomic effectiveness
  • Nicolas Puche - Doctor of Philosophy
    Detailed temporal modelling of carbon and water fluxes from pastures in New Zealand: Case study of an experimental dairy farm in the Waikato region
  • Helen Walker - Doctor of Philosophy
    Examination of the role of interactions of soil biota with pasture plants in carbon and nitrogen cycling with a view to understanding and mitigating greenhouse gas emissions

Co-supervisor of:

  • Maria Rodriguez Gelos - Doctor of Philosophy
    Natural control of nitrate leaching, nitrous oxide and ammonia losses with plantain pastures
  • Jay Howes - Doctor of Philosophy
    Optimizing pasture production on a dairy farm using a freestall barn
  • Khadija Malik - Doctor of Philosophy
    Ammonia emissions from a free-stall barn system used for duration controlled grazing of dairy cows in New Zealand
  • Ainul Mahmud - Doctor of Philosophy
    Monitoring the Stability of Biochar by Measuring the Soil C and Biochar-C in Biochar Amended Soils Using Visible-Near Infrared Spectroscopy

Completed Doctoral Supervision

Supervisor of:

  • 2017 - Jane Chrystal - Doctor of Philosophy
    Dairy wintering systems in Southern New Zealand - Quantification and modelling of nutrient transfers and losses from contrasting wintering systems
  • 2013 - Christine Christensen - Doctor of Philosophy
    Duration-controlled grazing of dairy cows: Impacts on pasture production and on nitrogen, phosphorus and faecal microbe losses to water
  • 2013 - Kiran Hina - Doctor of Philosophy
    Application of Biochar Technologies to waste water Treatment
  • 2012 - James Hanly - Doctor of Philosophy
    Management practices and technologies for reducing Nitrogen and Phosphorus losses from soils receiving farm dairy effluent.
  • 2011 - Peter Bishop - Doctor of Philosophy
    Polymer coated controlled release agrichemicals as mititgation tools in pastoral farming
  • 2010 - Ieda Sanches - Doctor of Philosophy
    Hyperspectral proximal sensing of the botanical composition and nutrient content of New Zealand pastures
  • 2009 - Bambang Kusumo - Doctor of Philosophy
    Development of field techniques to predict soil carbon, soil nitrogen and root density from soil spectral reflectance
  • 2005 - Tehseen Aslam - Doctor of Philosophy
    To investigate P uptake characteristics for maize and sweet corn.
  • 2002 - Tin Aye - Doctor of Philosophy
    Developing Sustainable Soil Fertility in Southern Shan State of Myanmar.
  • 2001 - Bhupinderpal Singh - Doctor of Philosophy
    Studies on the dynamics of organic sulphur and carbon in pastoral and cropping soils.
  • 2001 - Stephen Trolove - Doctor of Philosophy
    Root-soil-phosphate interactions in rice growing in aerobic soil.
  • 2001 - Jim Moir - Doctor of Philosophy
    Investigations into the influence of fertiliser history and climate regime on the soil fertility, soil quality and pasture production of Wairarapa hill soils.
  • 1997 - Keneti Faulalo - Doctor of Philosophy
    Investigating and Modelling the Dependency of Pasture Growth on Soil Sulphur and Phosphorus Availability.
  • 1996 - Hailong Wang - Doctor of Philosophy
    Potential Uses of Fluidised Bed Boiler Ash as a Liming Material, Soil Conditioner and Sulphur Fertiliser
  • 1993 - Donald Tambunan - Doctor of Philosophy
    Dissolution and Plant-Availability of Phosphate Rocks in Selected New Zealand and Indonesian Soils
  • 1992 - Sathien Phimsarn - Doctor of Philosophy
    Fate of Sulphur Fertilizers in Pasture Soils
  • 1991 - Karuppan Sakadevan - Doctor of Philosophy
    Factors influencing the Transformation and Fate of Sulphur and Nitrogen in Hill Country Pastures

Co-supervisor of:

  • 2017 - Aaron Stafford - Doctor of Philosophy
    Distribution of cadmium in long-term dairy soils, its accumulation in selected plant species, and the implications for management and mitigation
  • 2016 - Qinhua Shen - Doctor of Philosophy
    Can Biochar Ameliorate Phosphorus Deficiency and Aluminium Phytotoxicity in Acid Soils?
  • 2013 - Tao Wang - Doctor of Philosophy
    Development of methodologies for characterisation of biochars produced from human and animal wastes
  • 2013 - Saman Herath Mudiyanselage - Doctor of Philosophy
    Stability of Biochar and its Influence on the Dynamics of Soil Properties
  • 2013 - Amandeep Ghatohra - Doctor of Philosophy
    Effect of method of tillage on loss of carbon from soils
  • 2013 - Michael Bretherton - Doctor of Philosophy
    An investigation into repellency-induced runoff and its consequences in a New Zealand hill country pasture system
  • 2012 - Rajasheker Pullanagari - Doctor of Philosophy
    Proximal sensing techniques to monitor pasture quality and quantity on dairy farms
  • 2012 - Ina Draganova - Doctor of Philosophy
    Understanding Nutrient transfers by live stock to improve fertiliser advice and to reduce negative environmental impacts
  • 2008 - Robert Murray - Doctor of Philosophy
    Variable Rate Application Technology in The New Zealand Aerial Topdressing Industry
  • 2007 - Hayden Lawrence - Doctor of Philosophy
    Adoption of Precision Agriculture Technologies for Fertiliser Placement in New Zealand.
  • 2007 - Murom Banabas - Doctor of Philosophy
    Study of N Loss Pathways in Oil Palm (Elaeis guineensis Jacq.) Growing Agro-ecosystems on Volcanic ash-derived Soils in Papua New Guinea
  • 2006 - Rita Bhandral - Doctor of Philosophy
    Nitrous oxide emission from soil under pasture affected by grazing and effluent irrigation
  • 2005 - David Houlbrooke - Doctor of Philosophy
    A study of the quality of artificial drainage under intensive dairy farming and the improved management of farm dairy effluent using 'deferred irrigation'.
  • 2005 - Qianhe Liu - Doctor of Philosophy
    Rhizosphere Processes Influencing Soil and Fertiliser Phosphorus Availability to #Pinus radiata#.
  • 1999 - Julie Zanders - Doctor of Philosophy
    Studies on the Origin, Distribution and Mobility of Cadmium in Pastoral Soils.
  • 1998 - Agampodi Zoysa - Doctor of Philosophy
    The Influence of Phosphorus Fertiliser Forms and Rhizosphere Processes on the Phosphorus Nutrition of Tea (#Camellia# #sinensis# L.).
  • 1993 - Mahimairaja Santiago - Doctor of Philosophy
    An investigation of composting Poultry Manure in relation to Nitrogen Conservation and Phosphate Rock Dissolution
  • 1990 - Roberto Bonoan - Doctor of Philosophy
    An Assessment of the Nitrogen Fertilizer Requirements of

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