00398nam a2200121Ia 4500008004100000082001400041100002000055245008100075260002600156300001000182600001900192650006500211140224s9999    xx            000 0 und d  a631.81 N4  aNambiar, K.K.M.  aSoil fertility and crop productivity under long term fertiliser use in India  aNew DelhibICARc1994  a144p.  a K.K.M.Nambiar  aSoil science,Soil fertility,Crop productivity,Soil nutrition