Abstract

                                For normal crop production of wheat basic requirements of soil moisture and nutrients need to be provided in appropriate doses and at the appropriate stages of crop growth. Wadleigh et al (1946) reported that the plant growth is reduced as the soil moisture stress is increased. Mitra and Sabnis (1945) observed that water requirement of wheat varied between 8"-11" in three irrigations inclusive of 3-5 inches of presowing irrigation. Khan and Dhesi (1941) observed that two irrigations were sufficient for a successful wheat crop. Singh and Das (1961) found that in case of wheat crop 50 lb N level gave better yield over 25 lb dose of nitrogen. Singh and Rao (1954) reported that optimum dose of nitrogen was 60 lb per acre for wheat. Singh (1960) found that under each level of irrigation (wet, moist and dry) the yield of wheat increased with increased application of nitrogen and that more irrigation without fertiliser was harmful. Pandey and Haque (1965) reported that two irrigations, each of 7-5 om/ha scheduled at 30 and 55 days from the date of sowing gave the optimum grain yield at both 45 and 67 kg/ha levels of nitrogen. With a view to find out whether irrigations at other stages of plant growth have any bearing on yield characteristics, a modified experiment was laid out at the Irrigation Research Statian, Bikramganj under the Sone command area.

Key words :