Nitrogen and Phoshorus

Phosphorus use efficiency in wheat and barley
Glenn McDonald, Rob Wheeler, Kenton Porker Bill Bovill, Alan McKay, Alison Smith

The farm-gate phosphorus balance of sheep grazing systems maintained at three contrasting soil fertility levels
Richard J. Simpson, Adam Stefanski, David J. Marshall, Andrew D. Moore and Alan E. Richardson

Expanding the use of Diffusive Gradients in Thin-Films (DGT) for assessing phosphorus requirements of different crop types
Sean Mason, Ann McNeill and Mike J. McLaughlin

Sulphur-enhanced triple superphosphate as a substitute for single superphosphate
Graeme Blair

Effect of in-season moisture on carbon, nitrogen and phosphorus in alkaline, semi-arid soils 
Claire McMahon, Roger Armstrong, Therese McBeath and Mike McLaughlin