Basam Mazhar Kazem, Haifa Jassim Hussein, and Abdullah Abbas Hussein. 2024. “Effect of Adding NPK-Chitosan Fertilizer and Organic Matter On  Phosphorus and Potassium Content of Corn (Zea Mays L.)”. University of Thi-Qar Journal of Agricultural Research 13 (1): 146-52. https://doi.org/10.54174/utjagr.v13i1.310.