Agriculture Reference
In-Depth Information
Loes, A.-K. and Ogaard, A.F. (1997) Changes in the nutrient content of agri-
cultural soils on conversion to organic farming in relation to farm-level nutrient
balances and soil contents of clay and organic matter. Acta Agriculturae
Scandinavica, Section B, Soil and Plant Science 47, 201-214.
Mäder, P., Alfoldi, T., Fließbach, A., Pfiffner, L. and Niggli, U. (1999) Agricultural
and ecological performance of cropping systems compared in a long-term
field trial. In: Smaling, E.M.A., Oenema, O. and Fresco, L.O. (eds) Nutrient
Disequilibria in Agroecosystems. Concepts and Case Studies. CAB International,
Wallingford, UK, pp. 247-264.
Ministry of Agriculture, Fisheries and Food (1986) Analysis of Agricultural Materials .
Ministry of Agriculture, Fisheries and Food (1994) Fertilizer Recommendations for
Agricultural and Horticultural Crops , 6th edn. Reference Book 209. HMSO,
London.
Nguyen, M.L., Haynes, R.J. and Goh, K.M. (1995) Nutrient budgets and status
in three pairs of conventional and alternative and mixed cropping farms in
Canterbury,
New
Zealand.
Agriculture
Ecosystems
and
Environment
52,
149-162.
Penfold, C.M., Miyan, M.S., Reeves, T.G. and Grierson, I.T. (1995) Biological
farming
for
sustainable
agricultural
production.
Australian
Journal
of
Experimental Agriculture 35, 849-856.
Philipps, L. and Stopes C. (1995) The impact of rotational practices on nitrate
leaching losses in organic farming systems in the UK. Biological Agriculture and
Horticulture 11, 123-134.
Royal Commission on Environmental Pollution (RCEP) (1996) Sustainable Use of
Soil. 19th Report . HMSO, London.
Scoones, I. and Toulmin, C. (1998) Soil nutrient balances: what use for policy?
Agriculture Ecosystems and Environment 71, 255-267.
Sharpley, A.N. and Smith, S.J. (1989) Prediction of soluble phosphorus transport
in agricultural run-off. Journal of Environmental Quality 18, 313-316.
Shepherd, M.A., Bhogal, A., Philipps, L., Rayns, F., Lennartsson, E.K.M.,
Jackson, L. and Pain, B. (1999) The Environmental Impact of Manure Use in
Organic Agriculture . Report for the Ministry of Agriculture, Fisheries and Food.
OFO161, UK.
Skinner, R.J., Church, B.M. and Kershaw, C.D. (1992) Recent trends in soil pH
and nutrient status in England and Wales. Soil Use and Management 8, 16-20.
Watson, C.A. and Atkinson, D. (1999) Using nitrogen budgets to indicate nitrogen
use efficiency and losses from whole farm systems: a comparison of three
methodological approaches. Nutrient Cycling in Agroecosystems 53, 259-267.
Watson, C.A. and Stockdale, E.A. (1999) Whole farm nutrient budgets: what
do they tell us? BGS Occasional Symposium No.33 , Great Malvern, 22-23
November 1999, pp. 35-40.
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