Onweremadu, E. .; Aririguzo, B.; Okoli, N.; Afangide, I. . Temporal Variability of Soil Reaction Among Surface and Near-Surface Horizons of Soils of Dissimilar Lithology in a Humid Tropical Environment. Int. J. Environ. 2021, 10 (1), 99-111. https://doi.org/10.3126/ije.v10i1.38532.