Sulieman, Hind Mohammed, and Elamin Abdedlmagid Elamin. “Anaerobic Composting of Farmyard Manure As Affected by Chicken Manure, Urea and Waste Water”. University of Khartoum Journal of Agricultural Sciences 23, no. 2 (March 28, 2023). Accessed April 4, 2025. http://onlinejournals.uofk.edu/index.php/uofkjas/article/view/1803.