Ademe, Yackob Alemayehu, Shiferaw Tolosa Guda, and Ararsa Boki Lemma Lemma. 2020. “Contribution of organic inputs to maize productivity in the Eastern African region: A quantitative synthesis”. Agriculture and Natural Resources 54 (1). Bangkok, Thailand:64-73. https://li01.tci-thaijo.org/index.php/anres/article/view/240263.