The Role of Soil Organic Matter and Manures in Sustainable Nutrient Cycling - Sustainable Management of Soil Organic Matter - page 223

larger leaching losses, especially of N and including soluble organic forms
of N.
Acknowledgements
IACR receives grant-aided support from the UK Biotechnology and Bio-
logical Sciences Research Council. The authors also acknowledge funding
from the UK Ministry of Agriculture, Fisheries and Food and the European
Union.
References
Blake, L., Mercik, S., Koerschens, M., Goulding, K.W.T., Stempen, W., Weigel,
A., Poulton, P.R. and Powlson, D.S. (2000a) Potassium content in soil, uptake
in plants, and the potassium balance in three European long-term field
experiments. Plant and Soil 216, 1-14.
Blake, L., Mercik, S., Koerschens, M., Moskal, S., Poulton, P.R., Goulding,
K.W.T., Weigel, A. and Powlson, D.S. (2000b) Phosphorus content in soil,
uptake in plants, and the phosphorus balance in three European long-term field
experiments. Nutrient Cycling in Agroecosystems 56, 263-275.
Goulding, K.W.T., Bailey, N.J., Bradbury, N.J., Hargreaves, P., Howe, M.,
Murphy, D.V., Poulton, P.R. and Willison, T.W. (1998) Nitrogen deposition
and its contribution to nitrogen cycling and associated soil processes. New
Phytologist 139, 49-58.
Goulding, K.W.T. and Talibudeen, O. (1984) Thermodynamics of K-Ca exchange
in soils. I. Effects of potassium and organic matter residues in soils from the
Broadbalk and Saxmundham Rotation I Experiments. Journal of Soil Science
35, 397-408.
Greenland, D.J. (1997) Inaugural Russell memorial lecture: soil conditions and
plant growth. Soil Use and Management 13, 169-177.
Jensen, L.S., Mueller, T., Magid, J. and Nielsen, N.E. (1997) Temporal variation
of C and N mineralization, microbial biomass and extractable organic pools
in soil after oilseed rape straw incorporation in the field. Soil Biology and
Biochemistry 29, 1043-1055.
Johnston, A.E. (1997) The value of long-term field experiments in agricultural,
ecological and environmental research. Advances in Agronomy 59, 291-333.
Lawes, J.B. and Gilbert, J.H. (1881) On the amount and composition of the
rain and drainage waters collected at Rothamsted. Part II. The amount and
composition of the drainage waters from unmanured fallow land. Journal of the
Royal Agricultural Society of England 17, 311-350.
McNeill, A.M., Sparling, G.P., Murphy, D.V., Braunberger, P. and Fillery, I.R.P.
(1998) Changes in extractable and microbial C, N, and P in a Western
Australian wheatbelt soil following simulated summer rainfall. Australian
Journal of Soil Research 36, 841-854.