Author(s):

Kasi Viswanath R, Roop Kishore Sharma and Mallikarjuna G

Abstract: Field experiment was conducted during Rabi season of 2017-18 at College Farm of Doon Valley College of education, Dehradun, to study the effect of organic and inorganic manures on N, P and K content in grain and straw at harvest of maize under doon valley conditions. The experiment comprising of seven treatment combinations viz., T ₁= 100% RDF, T ₂= 100% RDF + FYM @05 t/ha, T ₃= 100% RDF + FYM @ 10 t/ha, T ₄= 100% RDF + vermicompost @3 t/ha, T ₅= 100% RDF + Vermicompost @05 t/ha T ₆= 100% RDF+Neem cake @ 05 t/ha T ₇= Control were tested in a randomized block design with three replications. Recommended dose of fertilizer (RDF) was 120-60-00 kg N-P-K/ha.  The results revealed that organic and inorganic manure source treatments influenced on N, P and K content in grain and straw. However, N, P and K content in grain and straw were recorded significantly higher in 100% RDF + Vermicompost @ 05 t/ha as compared to control. Maximum net returns of 57333 ₹ /ha and benefit: cost ratio value 2.68 was obtained in treatment of 100% RDF + Vermicompost @ 05 t/ha.

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