Afu, S. M., Adie, P. I., Olim, D. M., Isong, I. A., Akpama, A. I., & Aaron, M. E.,. (2022). Properties of soils of different lithology in the humid tropics of southeastern nigeria. Global Journal of Agricultural Sciences, 21(1), 91–101. https://doi.org/10.4314/gjass.v21i1.12