Mustapha, A. A, Abdu, N., Oyinlola, E. Y, Nuhu, A. A and Dawaki, M. U (2020) “Distribution of Aluminium, Iron, Calcium, Magnesium and Manganese in the Soils of Savannah Region of Northern Nigeria”, Journal of Agricultural Economics, Environment and Social Sciences, 6(1), pp. 32-39. Available at: https://jaeess.com.ng/index.php/jaeess/article/view/36 (Accessed: 23May2025).