Effect of irrigation stress and changes of source and destination on seed, oil and oleic acid yield of soybean

Seed, oil and oleic acid yields under irrigation stress and changes in source and destination were investigated in a split plot experiment in the frame of fully-random blocks with 3 iterations. Main factors were three stresses (a1: control group with 60mm evaporation from evaporation basin, a2: irrigation program as that of first experiment before germination stage and 150mm evaporation from evaporation basin afterward, a3: similar to irrigation program a1 before development stage of V3 and 150mm evaporation from evaporation basin afterward). Secondary factors under consideration were changes in source and reservoir including b1: control group without manipulation, b2: removal of 33% of leaves, b3: removal of 66% of leaves. Variance analysis table showed that variance of the traits under consideration were significant at 1 and 0.5% under irrigation and removal of leaves stress. Seed yield under irrigation stress showed considerable reduction (20530kg/hectare). Moreover, maximum oleic acid yield equal to 25.35 was obtained in samples with standard irrigation program and 66% leaves removal.