VivekKumar, Santosh2023-02-022023-02-022019“Effect of weed and nutrient management on performance of barley (Hordeum vulgare L.) and associated weeds”“Effect of weed and nutrient management on performance of barley (Hordeum vulgare L.) and associated weeds”https://krishikosh.egranth.ac.in/handle/1/5810193132“Effect of weed and nutrient management on performance of barley (Hordeum vulgare L.) and associated weeds”Barley is the most important food grain crop among cereals and stands next only to rice in our country. It has significantly contributed in the success of the green revolution and has greatly helped to transform our country from a situation of ship to mouth to being set-sufficient. Barley is a good supplement for nutritional requirement of human body as it contains 8-10% protein and 69.6% carbohydrates, 1.3% fat, 3.9% crude fiber. The productivity of barley is low. The main reasons are weed infestation and optimum plant nutrients to address these problems. A field experiment was conducted during 2015-16 and 2016-17at Crop Research Center, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.) to evaluate the Effect of weed and nutrient management on performance of barley (Hordeum vulgare L.) and associated weeds. The experiment was laid out in split plot design with three replications. The experiment comprised five levels of nutrients viz.; 100% NPK, 75% N-PK + 25% N through FYM, 75% N-PK + 25% N through vermicompost, 50% N-PK + 50% N through FYM, 50% N-PK + 50% N through vermicompost as main plot and four levels of weed control measures viz; Control, Two hand weeding, Trisulfuron 15g a.i ha-1 and Carfentrazone ethyl 15g a.i ha-1 as sub plot. Soil was sandy loam in texture with pH 8.3. Available N, P and K were 201.15, 14.7 and 192.32 kg ha-1, respectively. The significantly higher number of yield attributes and yield was obtained with the application of 75% N-PK + 25% N through vermicompost followed by 100% NPK. While reduction in weed density and weed dry matter accumulation was highest with the application of 75% N-PK + 25% N through vermicompost and it was more economical due to higher gross returns, net returns and B: C ratio. Among the different weed control practices the highest cost of cultivation and gross return was observed in two hand weeding closely followed by Trisulfuron 15g a.i ha-1. Net return and B:C ratio and weed control efficiency was observed highest in Two hand weeding closely followed by Trisulfuron 15g a.i ha-1 and Carfentrazone ethyl 15g a.i ha-1 Among the weed management practices, weed control treatments gave significantly higher yield attributes and yield compared to control. Among the herbicides Trisulfuron 15g a.i ha-1 was found more effective over Carfentrazone ethyl 15g a.i ha-1. The mean contribution of Phalaris minor to the total weed population in two hand weeding was 22.73, 25 and 24.61 per cent at 30, 60 and 90 DAS respectively. Among non-grassy weeds Chenopodium album and Melilotus spp. were dominant weed species. The contribution of others weeds in the total weed population was 16.65, 17.29 and 12.43 per cent, respectively at 30, 60 and 90 days after sowing. It is concluded that the adoption of 75% NPK + 25% N through vermicompost being statistically at par with 100% NPK improved the growth, yield attributing characters and yield of barley crop significantly and is found much profitable. Among the weed control practices Trisulfuron 15g a.i ha-1 improved the different growth parameters yield attributes and yield of barley crop over the control. Nutrient uptake by crop, status of the soil also improved with the integration of organic and inorganic sources as of plant nutrient. Thus 75% N-PK + 25% N through vermicompost with Trisulfuron 15g a.i ha-1 may be recommended for better weed control and higher barley yield.EnglishThesis