“Effect of Supplemental Nutrition of Nitrogen in Some Growth Characters of Corn (variety El-Maha) under Drip Irrigation System ”. Samarra Journal of Pure and Applied Science 3, no. 2 (September 24, 2021): 106–114. Accessed April 16, 2026. https://www.sjpas.com/index.php/sjpas/article/view/205.