Tesfaye, Abush, Mwangi Githiri, John Derera, and Tolessa Debele. “Subsistence farmers’ Experience and Perception about the Soil, and Fertilizer Use in Western Ethiopia”. Ethiopian Journal of Applied Science and Technology 2, no. 2 (November 30, 2011): 59-70. Accessed March 28, 2024. https://journals.ju.edu.et/index.php/ejast/article/view/810.