J. S. Galadima, et al. “Study on the Influence of Topography and Management Practices on Nitrogen Content of Soils Formed in Biotite-Granite Parent Material on the Jos Plateau, Nigeria ”. Recent Progress in Plant and Soil Research Vol. 5, Mar. 2022, pp. 71-79, doi:10.9734/bpi/rppsr/v5/2572C.