The study aimed to estimate the reality of production and production costs of the Barley crop and the demand for production suppliers and supply the product in Salah al-Din Governorate and what are the optimal quantities that should be used by farmers to reach the optimum production. As a random sample of (25) sprinklers were selected for the Barley crop in Salah El-Din Governorate, using  the Cobb-Douglas function:

Y = A   for Barley crops irrigated by Fixed sprinklers (50) dunums in Salah al-Din Governorate. The study concluded that the optimum volume of production for sprinklers of a category of (50) dunums reached (861.48) kg/dunum. While the offered quantities of Barley at the sale prices of the crop reached (450,420,390 thousand dinars/kg), The systems have 50 dunums (940.40, 799.32, and 671.26) kg/dunum, respectively. The percentage of demand for the labor component of the sprinklers was (50) dunums for the Barley crop (6.19) man/day. While the demand for the capital component of the systems is (50) dunums for the Barley crop (152.113) thousand dinars/dunum. In light of the results obtained, the study recommends directing farmers to use the optimal quantities of the labor resource (7.723) men. and capital (84345.9) in order to achieve optimal output. Providing the necessary production requirements of seeds with improved characteristics, high production, chemical fertilizers and pesticides, according to the optimal recommended quantities, at reasonable prices and on time.