J. S. Galadima, E. A. Olowolafe and I. S. Laka (2022) “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, pp. 71–79. doi: 10.9734/bpi/rppsr/v5/2572C.