Researcher Ali Adnan Hassouni's thesis aimed to determine the appropriate period of irrigation and the number of irrigation for the sorghum crop and determine the ability of varieties to tolerate water stress and recommend the most resistant variety.          

The study included four sorghum varieties and three irrigation periods.

The results of the experiment concluded that delaying the irrigation period to 15 days reduced the dry weight of the weeds associated with the sorghum crop for the two seasons respectively, compared to the other irrigation periods, which are every 5 days and every 10 days.

Shortening the irrigation period for every 5 days has improved the growth characteristics of the white corn crop and increased the plant height, stem diameter, leaf area, the number of grains per head, and the weight of 1000 grains, as well as gave the highest rate of grain yield for the first and second seasons respectively, and the highest rate of biological yield for the two seasons respectively. The varieties differentiated in their growth and production parameters.

Because of its negative effects on growth and yield, the study recommended that the short limited irrigation periods not be extended and not exceed 10 days.

The study recommended the cultivation of Enqath and Geza because of the higher yield. experimentation with other irrigation periods from 5 days, 7 days, and up to 9 days.