Bunmi, O.Y. and Ajayi, O.J. 2019. The Reactions of Common Chemical Fertilizers in An Ultisol and Their Effects on Cowpea Performance. JOURNAL OF TROPICAL SOILS. 24, 1 (Jan. 2019), 25–32. DOI:https://doi.org/10.5400/jts.2019.v24i1.25-32.