Standardization of organic manures levels for better growth, yield and economics of rice bean (Vigna umbellata L.) under Central Himalaya

A field experiment was conducted during Kharif 2011 and 2012 to find out the optimum levels of organic manures under organic management for higher yield of rice bean under rainfed condition at College of Forestry and Hill Agriculture, Hill Cmapus, Ranichauri, Tehri Garhwal Uttarakhand. Results exhibited that increasing levels of organic manures the plant growth in term of plant height, yield attributing characters i.e number of pods/plant, number of grains/pod, pod length (cm) and 1000 grain weight (g)) and ultimately yield of ricebean also were increased as dependent manner. Highest value of plant height, yield attributing characters and yields (Grain:1215 kg/ha and Straw: 2745 kg/ha) was recorded with 100% RDF (20 kg N and 60 kg P₂O₅/ha) which was at par with 50% RDF +2.5 tonne vermicompost and vermicompost @ 7.5 tonnes/ha. B:C ratio (2.07) was recorded maximum with 100% RDF. Use of vermicompost and FYM was not found economically suitable due to high cost of these manures.