Effected Irradiated Sewage Sludge and Compost on Jatropha Yield Production and Using 15Nitrogen

Studies on irradiation of sewage sludge indicated its feasibility both economical and hygienically but work in this point is limited. Also the effect of non-irradiated and irradiated sewage sludge as a source of N on yield production and improvements fertility of sandy soil. In this research using the organic manure, the effects were increased soil fertility and crop yield. Aseeds yield production by Jatropha curcas L., these treatments can be arranged in the following descending order: T5> T6> T7> T4> T2> T3> T1. The best value of Ndff% recorded with rate 50% gamma irradiated sewage sludge + 50% ammonium sulphate fertilizer. Values of Ndfo % for 75.2%, 74.8% and 73.3% for (50% non-irradiated sewage sludge + 50% ammonium sulphate), (50% compost + 50% ammonium sulphate) and irradiated sewage sludge + 50% ammonium sulphate respectively. In general, the FUE% with 100% ammonium sulphate was ammonium sulphate alone lower than those recorded with ammonium sulphate plus none or irradiated sewage sludge and compost when T5, T7, T6 and T1 treatments were considered.