Akinfiresoye, W.A. and Ogidan, J.A. 2024. Discovering the Macro-Elements Presence in Biochar Produced Indigenously. ABUAD Journal of Engineering Research and Development. 7, 1 (Jun. 2024), 208-213. DOI:https://doi.org/10.53982/ajerd.2024.0701.21-j.