AL-Kaaby , Mohammed. “Effect of Urea and Humic Acid Fertilization on Some chemical/Physical Properties and Yield of Cow Pea Vigna Unguiculata (L.) Walp”. University of Thi-Qar Journal of Science 3, no. 2 (June 25, 2019): 82-88. Accessed August 17, 2026. https://www.jsci.utq.edu.iq/index.php/main/article/view/503.