00457nam a2200109Ia 4500082002300000100005200023245018400075260003100259300002300290500000500313700002900318  a338.16016bEu89.NP  aEuropean Nitrogen Service programme, New Delhi.  aNPK in Indian agriculture, 1971-1975; a bibliography of Nitrogen, Phosphorus, Potassium and related factors in crops, soils, fertilisers and manuresbcCompiled by H. L. S. Tandon  aNew DelhibThe Auth.c1978  axxxii, 797p. Index  a  aTandon, H. L. S. ; Comp.