Qardash اماني أحمد, and Baabad معاذ عبدالمجيد. “The Use of Chemical Fertilizers in the Cultivation of Khat and Its Impact on the Physical and Chemical Properties of Soils in Al-Husain District, Al-Dhalaa- Yemen”. University of Aden Journal of Natural and Applied Sciences 24, no. 2 (October 31, 2020): 345–356. Accessed November 23, 2024. https://uajnas.adenuniv.com/index.php/uajnas/article/view/83.