002950000a22001210004500060000800000082001600008100001500024245004500039260005200084260000900136300000800145650002000153  a100  a631.586 GUP  aGupta, U S  aPhysiological aspects of dryland farming  aNew Delhi, Oxford & IBH publishing co. pvt. ltd  c1975  a391  aDryland farming