1. Dairy farming systems based on efficient nutrient management;Aarts;Neth. J. Agric. Sci.,1992
2. Farming, fertilizers and the nitrate problem;Addiscott,1991
3. The transfer of nitrogen from 15 N-labelled legume residues to corn and barley using two tillage systems;Alder,1988
4. Some practical field applications;Ascheman,1993
5. Plant nutrient flow in the managed pathways of an intensive dairy farm;Bacon;Agron. J.,1990