-Mahmod, A. A., Al-Saidi, A. J. H. ., & Saltern, K. A. (2017). Effect of Interaction Betw·een Phosphorus and Zink in Some Morphological Features of Two Varieties of Wheat Grown in Gypsum Soil. Ibn AL-Haitham Journal For Pure and Applied Sciences, 21(3), 37-55. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1403