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Bio-efficacy of weed management practices in rainfed potato

机译：Bio-efficacy of weed management practices in rainfed potato

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摘要

A field experiment was conducted during 2013-14, 2014-15 and 2015-16 at ICAR-Ccntral Potato Research Station, Shillong to evaluate the bio-efficacy of weed management practices in rainfed potato under North-Eastern hill region of India. Maximum potatotubers yield (21.3 t/ha) was recorded under weed free treatment followed by mctribuzin application 0.75 kg/ha as a prc-cmcrgcncc (PE). Reduction in crop yield due to presence of weeds was 54.0 per cent. Maximum uptake of nutrients, viz. nitrogen (113.2kg/ha), phosphorus (14.5 kg/ha) and potassium (89.4 kg/ha) were recorded by the potato under weed free fb application of mctribuzin 0.75 kg/ha as a PE. The highest net returns (IR/s 176100/ha) and B:C ratio (2.3) were recorded under the mctribuzin application 0.75 kg/ha. Thus, application of mctribuzin 0.75 kg/ha as PE was found more effective in potato under the rainfed ecosystem of North-Eastern hill region of India.

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