00270nam a2200097Ia 4500008004100000082002000041100001900061245004300080260004100123300000800164140113s9999    xx            000 0 und d  a581.1(213)   N0  a"Squire, G.R."  aPhysiology of Tropical Crop Production  a1990bCAB InternationalcWallingford  a236