Ecology, Environment and Conservation Paper

Vol 22, Issue 4, 2016; Page No.(1799-1802)

WEED MANAGEMENT THROUGH GREEN MANURING IN DIRECT SEEDED RICE (ORYZA SATIVA) UNDER MEDIUM LAND CONDITION AT EAST SINGHBHUM DISTRICT OF JHARKHAND, INDIA

Sheela Barla, R.R. Upasani, Amresh Chandra Pandey and Shambhu Saran Kumar

Abstract

Intercropping of green manuring in direct seeded Rice variety Naveen under medium land condition was studied to evaluate the weed dynamics at Zonal Research Station, Darisai, East Singhbhum, Jharkhand, during wet season 2010 and 2011. The significantly highest yield attributing parameters, grain (40.33 qha-1) and straw (80 qha-1) yield, maximum gross (Rs. 27817 ha-1) and net return (Rs. 17186 ha-1) was recorded in two hand weeding and was at par with incorporation of green manuring crops, recorded 45.37%, 32%, 40.76% and 56.91% higher grain yield as compared to application of 2,4-D on intercropped Sesbania aculeata (Dhaincha), Crotolaria juncea (Sunn Hemp), Vigna mungo (Back Gram) and Weedy Check, respectively. Significantly maximum benefit cost ratio 2.64 was recorded with Sesbania incorporated in Rice and was at par with two hand weeding, Sunn Hemp and Black Gram incorporated in Rice. Minimum weeds were recorded with Dhaincha intercropped and incorporated in Rice, this treatment was at par with incorporation of Sunn Hemp and Black Gram. Thus, on the basis of B:C ratio, incorporation of Dhaincha in direct seeded Rice is concluded as more profitable than two hand weeding and 2,4-D application for controlling weeds as well.

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