Abubakar AM, Luka Y, Abdullahi S, Baboo P, Kareem SA. NPK Biofertilizer Production from Banana Peel, Feather and Bone Ashes and their Comparative Advantage to 20:10:10 Inorganic Fertilizer. Sci. Eng. Technol. 2024;4(1):68-79. doi:10.54327/set2024/v4.i1.118