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Amoafoa B, Menka CA, Sumaila I. Nutrient Characteristics of Biochar Derived from Cocoa Husk, Rice Straw and Corn Cob and Their Effects on Maize Yield in Ghana. Direct Res. J. Agric. and Food Sci. [Internet]. 2026 Jan. 15 [cited 2026 Jul. 28];14(1):40-9. Available from: https://journals.directresearchpublisher.org/index.php/drjafs/article/view/597