Effect of farm yard manure and nitrogen on nutrient content and uptake of castor (Ricinus communis L.)

An experiment was conducted during kharif season of the year 2017-18 at Agronomy Instructional Farm, C. P. College of Agriculture, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar to study the “Effect of farm yard manure and nitrogen on nutrient content and uptake of castor (Ricinus communis L.)”. Nitrogen content in seed and stalk (%), nitrogen uptake by seed and stalk (kg/ha), available nitrogen in soil (kg/ha) were significantly increased with application of FYM prepared by pit method (M2). Whereas, phosphorus content in seed and stalk (%) and available phosphorus status in soil was not affected due to different methods of FYM preparation. With regard to effect of different nitrogen management treatments on castor, N content as well as N uptake by seed and stalk, available N in soil showed significant improvement due to application of 100% RDN + bio NPK consortium (N3). Remarkably higher phosphorus uptake by seed and stalk of castor was recorded with treatment combination M2N3 (application of FYM prepared by pit method + 100% RDN through fertilizer + seed inoculation with bio NPK consortium).