00770nam a2200157 a 450000100080000000500110000800800410001902000180006010000210007824500500009926000270014930000100017652003870018670000200057370000190059310261771999-12-22       1992    bl uuuu      00u1 u    #d  a0-85198-658-71 aADDISCOTT, T. M.  aFarming, fertiligers and the nitrate problem.  aWallingford: CABc1992  a170p.  aNitrate: perception of the problem. Nitrogen in crop production. The physics and chemistry of nitrate leakage. The biology of nitrate leakage. Measuring nitrate losses from soil. Chasing nitrate with a computer: modelling. Sources of nitrate leakage: arable farming. Sources of nitrate leakage: grassland and organic farming. Some complications. Ways of decreasing nitrate leaching.1 aWHITMORE, A. P.1 aPOWLSON, D. S.