Kamla Gandharv*, Navneet Kumar Mishra, Damini Thawait and N.K. Choubey
Department of Agronomy, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.), India
Received-25.11.2014, Revised-27.12.2014
Abstract: Results revealed that, FYM @ 5 t ha-1 (F1) has significant impact on dry matter accumulation of crop, total tillers m-2 and effective tillers m-2. Among weed management practices , hand weeding twice at 25 & 45 DAS (W7) produced significantly highest plant height, dry matter accumulation, total No. of tillers meter-2, leaf area, leaf area index, number of effective tillers meter-2, test weight (g), Crop growth rate, Absolute growth rate. Highest grain yield (4.21 t ha-1) , straw yield (5.52 t ha-1) and harvest index (51.54 %) was recorded under hand weeding twice at 25 & 45 DAS (W7), followed by Chemical weeding with bispyribac Sodium @ 20 g ha-1 25 DAS (W1), gave grain yield (4.03 t ha-1), straw yield (5.25 t ha-1) and harvest index (51.37 %) . The lowest was recorded under unweeded check (W8). In the experimental field, Commelina benghalensis L., Cyanotis axillaris Schult. F., Cyperus difformis L., Echinochloa colona (L.) Link, Monochoria vaginalis (Burm.f.) Kunth were dominant weeds. The lowest weed density, weed dry matter production and relative weed density were recorded under hand weeding twice at 25 & 45 DAS (W7), followed by Chemical weeding with bispyribac Sodium @ 20 g ha-1 25 DAS (W1). The highest economic return in terms of gross income (Rs. 42949.00) were obtained from hand weeding twice 25 & 45 DAS (W7), highest net income (26063.00) and B:C ratio ( 1.69) were obtained under chemical weeding with bispyribac sodium @ 20 g ha-1 25 DAS (W1).
Keywords: Growth, Yield, Weed dynamics
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