Tesfaye, Abush, Mwangi Githiri, John Derera, and Tolessa Debele. 2011. “Subsistence farmers’ Experience and Perception about the Soil, and Fertilizer Use in Western Ethiopia”. Ethiopian Journal of Applied Science and Technology 2 (2), 59-70. https://journals.ju.edu.et/index.php/ejast/article/view/810.