00389nam a2200133Ia 4500008004100000082001700041100002200058245006300080250000900143260004300152650002200195650002100217700001700238220204s9999    xx            000 0 und d  a631.584bPAL  aPalaniappan,  S P 0aCropping system in the tropics : principles and management  aEd.2  aNew DelhibNew Age Internationalc1996  aMultiple cropping  aOn farm research  aSivaraman, K