00450    a2200157   4500020001500000082001600015100002300031245004000054250001300094260006500107300002000172650003100192650003500223700001900258700001500277  a812040419X  a631.58bCHA  aChatterjee, B. N.   aCropping system btheory & practice  a2nd ed.   aNew DelhibOxford & IBH Publishing Co. Pvt. Ltd.c1989g1989  axiv,345p.c22cm  aCultivation and harvesting  aSpecial methods of cultivation  aMandal, B. K.   aMaiti, S.