Kareem Salman Al-Mafraji, Marwa, and Mohammed Ahmed Ibraihi AL-Anbari. 2024. “Study of Genotypic and Phenotypic Correlations and Stepwise Regression Analysis in Maize Under the Influence of Combinations of Nitrogen Fertilization and Humic Acid”. Pure Sciences International Journal of Kerbala 1 (2). https://journals.uokerbala.edu.iq/index.php/psijk/article/view/1408.