Department of Agronomy and Agrometeorolgy, H. P. Krishi Vishva Vidyalaya, Palampur (HP)
* A Part of Ph. D. Thesis submitted by the first author to Himachal Pradesh Krishi Vishva Vidyalaya, Palampur, H. P.
Rainfed experiment was conducted on clay loam soil with high available nitrogen and potassium, medium in available phosphorus and acidic in reaction (pH 5.4) during Kharif 1980 and 1981. The weeds were controlled to th; threshold level by ihe appli. cation of alachlor (2-chloro-2,6 diethyl-N (methoxy-methyl) acetanilide 2.5 kg a.i./ha in maize as well as maize + soybean cropping systems. Control of weeds either through alachlor or handweeding incresed the grain as well as maize equivalent yield significantly over no weed control in both systems. The weed number and their dry weight reduced significantly due to different weed control methods and also by growing soybean in between two rows of maize.
