Effect of Herbicides Treatments and Cultural Practices on Physiological Parameters, Growth and Yield of Soybean

The experiment using JS 97–52 variety of soybean was laid out during kharif season of 2013 at the Research cum Instructional Farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) using Randomized Block Design, comprising four replications and eight treatments. Significantly Density of weeds and dry weight of weeds was maximum under untreated control and significantly minimum density was recorded under Hand Weeding twice at 20 and 40 DAS. Maximum leaf area index and seed yield was recordedunder the treatment Hand weeding twice at 20 DAS and 40 DAS followed by Sulfentrazone @ 300 g a.i. ha⁻¹as PE + Imazethapyr @ 100g a.i. ha¹ as PoE and minimum leaf area index andseed yield was observed under untreated control. Maximum crop growth rate was observed under treatment Pendimethalin @ 1 kg ha⁻¹(T₃). Minimum crop growth rate was observed under Sulfentrazone @ 360 g a.i. ha⁻¹as PE (T₂). Maximum RGR was observed under untreated control (T₈), minimum RGR was observed under Sulfentrazone @ 360 g a.i. ha⁻¹as PE (T₂). Maximum seedyield was recorded under the treatment Hand weeding twice at 20 DAS and 40 DAS followed by Sulfentrazone @ 300 g a.i. ha⁻¹asPE + Imazethapyr @ 100g a.i. ha⁻¹ as PoE and minimum seed yield was observed under untreated control.