Author(s):

Prashant Singh, Ravi Shanker Singh, Dinesh Kumar, Rajesh Kumar, Sanjay Kumar, Mahendra Pratap Singh and Gajendra Singh

Abstract: The field experiment was conducted to study the studies on nitrogen sources and weed management practices on turmeric with variety NDH-1, at agronomy research farm, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhaya in during Kharif season of 2016-17 and 2017-18. The experiment laid out in split plot design with three nitrogen sources (N₁-100% RDN through inorganic fertilizer, N₂-100% RDN through FYM 24 t ha^-1, and N₃-100% RDN through vermicompost 6t ha^-1) as main plot and four weed management practices (W₁-rice straw mulch 10t ha^-1, W₂- manual weeding at 30, 60, 90,120 DAP, W₃-atrazine 700 g ha^-1 PE and W₄- weedy check) in sub-plot. The observations were recorded on weeds at successive stages of crop growth during both the years. The major weed flora recorded in the experiment was Echinochloa colona, Commelina benghalensis and Eleusine indicaamong grasses; Ammania beccifera, Ageratum conyzoides, Melilotus indica and Solanum nigrumamong the broad leaved and Cyperus rotundus and Fimbristyllis dichotomain sedges. Different nitrogen management treatments did not affect the weed density and weed dry weight significantly among themselves but plant height, fresh and dry weight of rhizome plant^-1and rhizome yield ha^-1higher in N₃-100% RDN through vermicompost which was significant superior with N₁- 100% RDN through inorganic fertilizer 120 N and at par with N₂- 100% RDN through FYM 10t ha^-1. The various weed control treatments were concerned, higher plant height, LAI, yield attribute (fresh and dry weight of rhizome g plant^-1) with lower value of weed density and dry weight were recorded W₂- manual weeding at 30, 60, 90 and120 DAP followed by W₁-rice straw mulch 10t ha^-1. However, weedy check treatment recorded significantly lower values of the entire growth characters plant height, yield and yield attributes and higher values of weed density and weed dry weight over rest of treatment in sub plot. highest weed control efficiency was recorded with Hand weeding at 30, 60, 90 and 120 day after planting (100% and 100.0%) fb rice straw mulch 10 t ha^-1(69.2% and 66.8%), which was near to comparable with the Hand weeding at 30, 60, 90 and 120 day after planting. However, lowest weed control efficiency was recorded in weedy check (0.0 and 0.0) during both years.

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