000 00571 a2200193 4500
245 1 _aChanges in soil properties in a long term multiple cropping systems.
300 _a200p.
650 _aCropping system
650 _aBiological properties
650 _aChemicophysical properties
650 _aNPK fertilizers
650 _aNutrients calcium
650 _aSulphur
502 _cIARI, Division of Soil Science and Agricultural Chemistry, New Delhi
_bPh.D.
_d1978
502 _gGhosh, A.B.
100 1 _aBabrekar, P.G.
_d
942 _2udc
_cT
901 _aT3387
999 _c140860
_d140860