00513nam a2200133Ia 4500008004100000020001800041040003800059100004100097245016200138250000800300260003600308300002500344653001000369211231s9999    xx            000 0 und d  a81 204 1212 5  cJayakar Knowledge Resource Centre  aCrop Productivity And Sustainability 0aCrop productivity and sustainability: shaping the future :proceedings of the 2nd international crop science congress, organized jointly by the naasi and icar  a1st  bOxford and IBHaNew Delhic1998  axxviii,I.63,1111p p.  aCrops