000 00276 a2200121 4500
080 _a631.452(063)
_bI 61 P
245 1 _aSoil fertility evaluation
_bProceedings:
260 _aNew Delhi
_c1972
650 _aSoil Fertility
100 _a
_d
300 _a156 p.
901 _a120205
999 _c80836
_d80836