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Resource conservation techniques and weed management in mungbean [Vigna radiata (L.)]
(CCSHAU, 2005) Anupam Kumar; Malik, Y.P.
A field experiment was conducted at Research Farm of CCS HAU, Hisar to evaluate the Resource Conservation Techniques (RCTs) and weed control treatments in mungbean (Vigna radiata (L.) Wilzeck) during kharif season of 2004. The density and dry weight of carpetweed (Trianthema portulacastrum) were significantly lower under furrow irrigated raised bed system (FIRBS) compared to zero and conventional tillage. Yield and yield attributes of mungbean were not influenced by different RCTs. Pendimethalin at 1.0 kg ha-1 applied pre emergence was found most effective in reducing density and dry weight of carpetweed at 20 days after sowing (DAS) but at 40 DAS pendimethalin at 0.75 kg (pre emergence)+ one hand weeding (30 DAS) proved more effective against this weed. At 60 DAS and at harvest, hand weeding given at 20 and 40 DAS were superior over all other treatments. Significantly higher grain yield of mungbean was recorded in weed free plots compared to plots receiving other treatments. Grain yield of mungbean was reduced to a tune of 31.6% when weeds were allowed to grow throughout the growth season. Highest and lowest nutrient uptake by crop as well as weed was recoded under weed free and weedy check, respectively. From economics point of view, alachlor (1 kg ha-1) was found most effective particularly when combined with FIRBS.