Abstract
Abstract The study aims to recognize the effect of supplementary irrigation on the average of wheat productivity at Ninaveh Governorate for the agricultural season (2001-2002) represented by astral variable. In order to achieve this, a role of supplementary irrigation in increasing the agricultural yields productivity has been recognized, depending on the previous studies and experiments that dealt with the same subject. Then, effect of rain amounts, rain distribution (plant growing stages), rain distribution with astral variable and rain amounts with astral variable on the productivity have been recognized. The analysis showed positive significance for supplementary irrigation against the average of wheat productivity. .
