000 00407nam a2200169Ia 4500
008 170101s1971 xx 000 0 und d
082 _a631.4 G60S
100 _aGovinda Rajan, S.V.
245 0 _aSoil and crop productivity
260 _aBombay
_bAsia
_c1971
300 _a23cm. 313
650 _aINDIA -- SOIL
653 _aCROP YIELDS
653 _aINDIA -- SOIL
653 _aSOIL
942 _2ddc
_cB
999 _c44254
_d44254