Effect of some new post-emergence herbicides on weed parameters and seed yield of soybean (Glycine max) Chandel A.S., Saxena S.C. Department of Agronomy, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttaranchal, 263145 Abstract A field experiment was conducted during the rainy season of 1996 and 1997 at Crop Research Centre, Pantnagar, on silt-loam soil to study the effect of post-emergence herbicides and their rates on the weed parameters and seed yield of soybean [Glycine max (L.) Merr.]. Plant height, number of trifoliates, dry matter/plant, yield attributes and seed yield of soybean, weed dry matter and weed density were significantly affected by herbicides. Highest seed yield and seed-production efficiency were obtained under 2 hand-weedings at 30 and 45 days after sowing and with anilophos @ 1.75 kg ai/ha, propaquizafop @ 75 g ai/ha and imazethapyr @ 100 g ai/ha, respectively, during 1996 and 1997. Top Keywords Herbicides, Post-emergence, Soybean, Growth, Yield attributes, Weed control, Seed-production efficiency, Seed yield. Top |