Contribution of Department of Agronomy J. N. Knshi Vishwa Vjdyalaya, Jabalpur (M.P.)
Field experiments were conducted on drilled upland rice to evaluate the efficiency of different weed control practices (cultural, mechanical and chemical) under varying nitrogen levels (0,30, 66"& 90 kg N/ha) at Jabalpur (M.P.) during Kharif seasons of 1985 and 1986. Pre-emergence application of Oxadiazon 1 kg/ha supplimented with post-emergence application of 2,4-D 1 kg/ha at 30 d a s was equally good to hand Weeding twice at IS and 40 d a s in controlling the weeds Rice responded significantly up to 90 kg N/ha under all methods of weed control. However, chemical method of weed control proved more effective at all levels of nitrogen.
