ONWUKA, Brown Mang, and Emmanuel Adeboye ADESEMUYI. 2019. “Spatial Distribution of Soil Bulk Density, Organic Carbon and PH under Different Land Use Systems Along Umuahia South Local Government Area of Abia State in South Eastern Nigeria”. Notulae Scientia Biologicae 11 (2):298-303. https://doi.org/10.15835/nsb11210466.