Vol. 19 No. 2
Impact of weed management on yield, uptake and availability of nutrients in direct sown ragi
Author(s): SNEHA S.R., SHEEJA K RAJ, JACOB, D. AND SHALINI PILLAI P.
Abstract: A field experiment was laid out during summer season 2021 to assess the impact of weed management on yield, availability of nutrients, uptake by crop and nutrient removal by the weeds in direct sown ragi. The experiment was conducted at the research farm attached to Coconut Research Station, Balaramapuram, Kerala Agricultural University, Thiruvananthapuram, Kerala in RBD with 12 treatments each with three replications. Weed management enhanced the uptake of major nutrients (N, P and K) by ragi to a tune of 43.0-108.0 per cent, 3.2-17.0 per cent, 10.59-121.22 per cent, respectively compared to control (un-weeded check). At 60 DAS, weed management reduced the N removal of weeds by 29.2-93.7 per cent, P removal by weeds 40.3-77.15 per cent and K removal by weeds 4.0-92.6 per cent. Yield enhancement due to weed management practices was 16.3-116.8 per cent over weedy check. Pre-emergence pyrazosulfuron 20 g ha-1 followed by wheel hoe weeding at 25 DAS registered the highest grain yield (2072 Kg ha-1) of ragi.
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