10.22376/ijpbs.2019.10.1.p1-12 Volume 2 Issue 2 2011 (April - June) The present investigation entitled, "Effect of organic and inorganic sources of nitrogen(N) on yield attributes and yield of rice ( lessThan i greaterThan Oryza sativa lessThan /i greaterThan )" was carried out at the Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi during lessThan i greaterThan Kharif lessThan /i greaterThan seasons of 2001 and 2002, in agro–ecological zone V of India. The soil of experimental site was sandy clay loam in texture with normal pH, low in nitrogen and phosphorus and medium in organic carbon and potassium contents. The experiment was laid out in Randomised Block Design with nine treatments replicated thrice. The treatments were applied to rice crop during lessThan i greaterThan kharif lessThan /i greaterThan season. Application of 120 kg N ha lessThan sup greaterThan -1 lessThan /sup greaterThan through chemical fertilizer (T lessThan sub greaterThan 9 lessThan /sub greaterThan ) and combination of D.S, P.M and C.W (T lessThan sub greaterThan 8 lessThan /sub greaterThan ) increased effective tillers m lessThan sup greaterThan -2 lessThan /sup greaterThan as well as HI significantly as against the other N sources along with control (T lessThan sub greaterThan 1 lessThan /sub greaterThan ) and remained at par to each other. However, highest number of effective tillers m lessThan sup greaterThan -2 lessThan /sup greaterThan , filled grains per panicle, 1000 grain test weight and HI were observed in the treatment receiving recommended doses of chemical fertilizer (T lessThan sub greaterThan 9 lessThan /sub greaterThan ) followed by the treatment T lessThan sub greaterThan 8 lessThan /sub greaterThan (@ 40 kg N ha lessThan sup greaterThan -1 lessThan /sup greaterThan each source). Application of N through chemical fertilizer (T lessThan sub greaterThan 9 lessThan /sub greaterThan ) brought about significant improvement in grain and straw yields of rice crop and established superiority over rest of the treatments. Among organic N sources, supplication of N through combination of D.S + P.M + C.W @ 40 kg N ha lessThan sup greaterThan -1 lessThan /sup greaterThan each (T lessThan sub greaterThan 8 lessThan /sub greaterThan ) increased the grain and straw yield significantly as against the application of rest of the organic N sources and the control (T lessThan sub greaterThan 1 lessThan /sub greaterThan ) except the straw yield due to incorporation of P.M alone (T lessThan sub greaterThan 3 lessThan /sub greaterThan ) which remained at par. Debiprasad Dash, Hrusikesh Patro, Damodara Parida, Pramod Kumar Panda, Ajay Kumar, Ramesh C. Tiwari And Mohammad Shahid Organic sources, yield attributes, yield, rice. 1-7