Keywords: late-sown wheat, seed rate, nitrogen, irrigation

Response of late-sown wheat in relation to seed rate, nitrogen levels and irrigation was conducted by initiating a field study laid out in randomized complete block design in 3 replications at Agronomy farm of IAAS, Rampur, Chtiwan during December 2002 to April 2003. There were 3 levels of seed rate (100, 150 and 200 kg/ha), 4 levels of nitrogen (0, 40, 80 and 120 kg/ha), and irrigation (with and without). Altogether there were 24 treatments combination. Accordingly, result showed that the seed rate of 200 kg/ha and 120 kg N/ha produced significantly (P<0.05) maximum plants per square meter. Result also indicated that the effective number of panicles per square meter was significantly higher under 200 kg/ha of seed rate, while other yield attributing parameters were significantly higher under 100 kg/ha. Panicle length was significantly higher under 80 kg N/ha, grains per panicle, and 1000 grains weight was significantly higher at 40 kg N/ha as compared to no nitrogen treatment. Significantly higher grain yield with moderate seed rate of 150 kg/ha (3.37 mt/ha). Nevertheless, higher grain yield was also associated with 150 kg/ha of seed rate and 80 kg N/ha (4.04 mt/ha). Higher grain yield 3.82 mt/ha was found under 80 kg N/ha which was significantly higher than other nitrogen treatments. Through frequent rain during crop season did not allow the response to irrigation, yet 6.24% increase in grain yield was recorded due to one irrigation compared to none. Research result concluded that for late season wheat 150 kg/ha seed rate and 80 kg N/ha should be used for better yield response.