“The Optimal Size of Wheat Farms Irrigated by Supplementary Irrigation of Pivot Sprinklers Is 60 Dunums in Salah Al-Din Governorate Tikrit District for the Production Season 2021 2022”. 2023. Euphrates Journal of Agricultural Science 15 (2): 342-47. https://ejs-agri.com/index.php/EJAS/article/view/96.