Abstract: Crop irrigated at 25 and 50 percent ASMD gave 21.53 and 17.10 percent greater grain yield ha–1 than that irrigated at 75 percent ASMD. Application of P2O5 at 200, 150 and 100 kg ha–1 increased grain yield by 24.50, 20.31 and 13.64 percent, respectively over control. In general, maize irrigated at 25 percent ASMD gave significantly higher grain starch and ail content, than that irrigated of 75 percent ASMD, but it significantly decreased grain protein content. Similarly application of K2O significantly increased grain starch and oil content. However, K2O application had non-significant effect on grain protein content in 1992 but caused significant increase in 1993.