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245 _aThe suitabilities of vertisols and associated soils for improved cropping systems in Central India.
260 _aNagpur
_bNBSS&LUP
_c1991
300 _a62p.
490 _aNBSS Publication; no.30
650 _aCropping systems,Vertisols
942 _cGRBK
999 _c83010
_d83010