Sulieman Ahmed Gasim El Said, Hatil Hashim EL-Kamali, and Sara Ahmed Saad. “Analysis of Physico-Chemical and Macro Element Concentration in Soils of Six Farmlands in Khartoum State, Central Sudan”. Journal of The Faculty of Science and Technology, no. 7 (August 17, 2021): 117 - 124. Accessed April 30, 2026. https://journal.oiu.edu.sd/index.php/JFST/article/view/964.