Agricultural residues (wastes) are being churned out in large quantities and indiscriminately disposed all over the world in general and Nigeria is not left out as population increases. Converting agricultural residues into valuable resource materials such as biochar would no doubt enhance sustainability with the development of soil amendment materials for agronomic and environmental applications as well as reduce diverse health issues arising from the indiscriminate disposal of waste. This study on agricultural wastes from banana (Musa balbisiana) leaves, cassava (Manihot esculenta) peels, mango (Mangifera indica) leaves, plantain (Plantago lanceolata) leaves and peels were pyrolyzed at different temperatures; 300, 400, 450, 500 and 600 °C using a muffle furnace to exploit their efficiency as feedstock for use in various applications. The physicochemical properties; pH, bulk density, percentage yield and electrical conductivity were determined using different analytical tools and the results obtained showed variations associated with pyrolysis temperature source of the agricultural residue. More information obtained from Scanning Electron Microscopic (SEM) and Energy Dispersive X-ray (EDX) measurements showed similar variations in texture, porosity and elemental composition with pyrolysis temperature which provides important baseline information for the production of biochars from agricultural wastes with desired properties for environmental applications such as carbon sequestration and greenhouse gas reduction, as well as agricultural applications to improve soil conditions and management.