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Nitrogen in the Environment

McLay, C.D.A., Dragten, R., Sparling, G., and Selvarajah, N. 2001. Predicting groundwater nitrate concentrations in a region of mixed agricultural land use: a comparison of three approaches. Environmental Pollution, 115 (2001) 191-204.

Green, S.R., Clothier, B.E., Watt, J.P., McIndoe, I. and Selvarajah, N. 1999. Predicting the fate of nitrogen in a dairy pasture system. In: Proceedings of the New Zealand Institute of Agricultural Science and the New Zealand Society for Horticultural Science Annual Convention 1999, Albany Campus, Massey University, New Zealand.

Barkle, G.F, Brown, T.N, Singleton, P.L, Selvarajah, N and Painter, D.J. 1998. Impact of controlled drainage on nitrogen leaching and solute behaviour. In: Drainage in the 21st century: Food production and the Environment, (Ed Brown, L.C), American Society of Agricultural Engineers, Orlando, Florida, U.S.A. pp 638-648.

Selvarajah, N. 1998. Treating farm dairy effluent to minimise impacts on New Zealand water quality. Advice to Uruguayan Dairy Farmers. Invited KEYNOTE paper presented at the Desafio Lechero Conference in Florida, Uruguay, 27-28 August 1998.

Selvarajah, N. 1998. Treating farm dairy effluent to minimise impacts on New Zealand water quality: Advice to Uruguayan Dairy Farm Consultants. Invited KEYNOTE paper presented at the Desafio Lechero Conference in Florida, Uruguay, 27-28 August 1998.

Boothroyd, I., Crush, J.R., Ledgard, S.F., Huser, B. and Selvarajah, N. 1997. Impacts of nitrogen flows from agricultural production environments on biodiversity of non-agricultural ecosystems in the Waikato Region, New Zealand. ABSTRACT. In: Conservation in production environments. Nature Conservation 5.

Selvarajah, N. 1996. Sustainable nitrogen fertiliser use in the Waikato Region. New Zealand Soil News, 44-5.

Selvarajah, N. 1996. Determination of sustainable nitrogen loading rates for land treatment systems without adequate soil and ground water information: Dairy farm effluent application onto grazed pasture in the Waikato Region. In: Recent developments in understanding chemical movements in soils: Significance in relation to water quality and efficiency of fertiliser use. (Eds L D Currie and P Loganathan). Occasional Report No. 9. Fertilizer and Lime Research Centre, Massey University, Palmerston North. pp 85-103.

Ledgard, S.F., Selvarajah, N., Jenkinson, D., and Sprosen, M.S. 1996. Groundwater nitrate levels under grazed dairy pastures receiving different rates of nitrogen fertiliser. In: Recent developments in understanding chemical movements in soils: Significance in relation to water quality and efficiency of fertiliser use. (Eds L D Currie and P Loganathan). Occasional report No. 9. Fertilizer and Lime Research Centre, Massey University, Palmerston North. pp 229-236.

Trimmer, L., McLay, C., Selvarajah, N., and Benge, K. 1996. Reactions of urea in Waikato Soils. In Soil Science – Raising the Profile, Australian and New Zealand Soil Science Society Conference, University of Melbourne, Parkville, Australia.

Ledgard, S.F., Crush, J.R. and Selvarajah, N. 1994. Nitrogen and the Environment. Proceedings Ruakura Farmers Conference, New Zealand, 46, 15-21.

Selvarajah, N., Maggs, G.R., Crush, J.R. and Ledgard, S.F. 1994. Nitrate in ground water in the Waikato region In: The Efficient Use of Fertilisers in a Changing Environment: Reconciling productivity with sustainability. (Eds. L D Currie and P Loganathan). Occasional Report No. 7. Fertiliser and Lime Research Centre, Massey University, Palmerston North, New Zealand. pp 160-185.

Selvarajah, N., Sherlock, R.R. and Cameron, K.C. 1993. Ammonia volatilisation potentials of New Zealand agricultural soils broadcast with granular urea. In Land Treatment Collective, Papers for Technical Session No. 8, FRI, Rotorua, New Zealand.

Selvarajah, N. 1991. Field studies of ammonia volatilisation potentials of unsaturated soils fertilised with granular urea. Ph.D. Thesis, Department of Soil Science, Lincoln University, Canterbury, New Zealand.

Selvarajah, N., Sherlock, R.R. and Cameron, K.C. 1989. Effect of different soils on ammonia volatilisation losses from surface applied urea granules. In: Nitrogen in New Zealand Agriculture and Horticulture (Eds. R.E. White and L.D. Currie), Occasional Report No. 3, Fertiliser and Lime Research Centre, Massey University, Palmerston North, New Zealand. pp 145-156.