Studies were conducted for two years (1970–71 and 1971–72) to compare three levels of irrigation (25, 50 and 75 per cent available soil moisture) and four doses of nitrogen (100, 120, 140 and 160 kg/ha). Higher potato yield was recorded when irrigations were applied at 75 per cent available soil moisture followed by 50 per cent and 25 per cent soil moisture. Application of nitrogen dose at the rate of 160 kg/ha produced highest potato yield in comparison to other treatments. Irrigation and nitrogen application at the rate of 100 kg and 120 kg/ha did not show any significant influence on tuber size.
