Author(s):

RK Yadav and SL Mundra

Abstract: An experiment was conducted during kharif seasons of 2013 and 2014 at Instructional Farm of Rajasthan college of Agriculture, Udaipur ( Rajasthan) to evaluate the effect of weed management and sulphur nutrition on weed density, their biomass, productivity of Clusterbean [Cyamopsis tetragonoloba (L.) Taub] and profitability in terms of net returns and BC ratio. Hand weeding twice at 20 and 40 DAS recorded minimum weed count and weed dry matter at 50 DAS. m The minimum weed dry matter of narrow-leaved (129 kg ha^-1), broad-leaved (106 kg ha^-1) and total weed dry weight (235 kg ha^-1) was recorded under two hand weeding treatment which was closely followed by sequential application of pre emergence application of pendimethalin 0.75 kg ha^-1followed by post emergence application of imazethapyr 0.075 kg ha^-1. The highest yield attributing characters viz., cluster plant^-1, pods cluster^-1, seeds pods^-1, 1000 seed weight and seed yield plant^-1 were recorded under two hand weeding followed by sequential application of pendimethalin with imazethapyr. The highest seed (1218 kg ha^-1) and haulm (2440 kg ha^-1) was registered in hand weeded twice treatment while net returns of 36952 and BC ratio of 2.60 was recorded pendimethalin fb imazethapyr.

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