Integration of chemical and mechanical weed management to enhance the productivity of soybean (Glycine Max)

Soybean (Glycine max) is one of the most important crops of India but the productivity of the soybean is poor due to heavy weed infestation in rainy season. Therefore field studies were conducted during Kharif 2014 to evaluate the losses caused by weeds and their control measure to enhance the productivity of soybean. Lowest weed density and dry matter were observed in twice hand weeding (20 & 40 DAS) however it was found at par with tank mix herbicides i.e., Chlorimuron Ethyl @ 09gm/ha + Quizalofop-p-ethyl @ 50 g/ha and Imazethapyr @ 35 g/ha + Imazamox @ 35 g/ha. As per economics, combined application of Chlorimuron Ethyl (POE) @ 09gm/ha + Quizalofop-p-ethyl @ 50 g/ha was found more remunerative, as they fetched higher net monetary returns (Rs 42978)and benefit cost ratio (3.26:1) followed by Imazethapyr @ 35 g/ha + Imazamox @ 35 g/ha.