Thakur, D.R.Singh, Sukhchain2019-02-022019-02-022018-07http://krishikosh.egranth.ac.in/handle/1/5810093340The experiment was conducted at the Experimental Farm of Rice and Wheat Research Centre, Malan during kharif 2017 to study the performance of neem coated urea in irrigated rice. There were nine treatments viz.,100% recommended dose of nitrogen (RDN) through prilled urea in three splits (50% Basal + 25% MT + 25% PI), 75% RDN through NCU in three splits (50% Basal + 25% MT + 25% PI), 100% RDN through NCU in three splits (50% Basal + 25% MT + 25% PI), 125% RDN through NCU in three splits (50% Basal + 25% MT + 25% PI), 100% RDN through NCU (100% basal), 100% RDN through NCU in two splits (50% Basal + 50% MT), 100% RDN through NCU in two splits (75% Basal + 25% MT), organic nutrient management and control treatment in which no nitrogen was applied. The trial was laid out in a Randomized Block Design (RBD) with three replications The soil of the experimental field was silty clay loam in texture, acidic in reaction (5.2), medium in available N (461 kg ha-1), high in available P (44 kg ha-1) and medium in available K (248 kg ha-1). The results obtained from this study showed that the application of 125% RDN through NCU in three splits (50% Basal + 25 % MT + 25% PI) gave significantly higher values for almost all the yield attributes viz. number of panicles, filled grains per panicle and 1000 grain weight as well as grain yield and straw yield of rice though this treatment was at par with application of 100% RDN through NCU three splits (50% Basal + 25 % MT + 25% PI), 75% RDN through NCU in three splits (50% Basal + 25 % MT + 25% PI) and 100% RDN through prilled urea in three splits (50% Basal + 25 % MT + 25% PI). Similar results were also recorded in term of uptake of nitrogen, phosphorus and potassium by grain and straw. Maximum nitrogen use efficiency and agronomic efficiency were recorded with application of 75% RDN though NCU in three splits (50% Basal + 25 % MT + 25% PI). Highest net return and B:C ratio was obtained with the application of 125% RDN through NCU applied in three splits (50% Basal + 25 % MT + 25% PI), whereas control treatment in which no nitrogen was applied resulted in significantly lowest net return and B:C ratio. On the basis of the results obtained in this investigation it is evident that the neem coated urea performed better than the prilled urea, also the application of neem coated urea in three splits gave better results than its application in two splits or as basal application.ennullThesis