GIDEON, I. .; OGBONNA, A. .; NZEGBULE, E. . Soil Physico-Chemical Properties in Three Land Use Systems (Theobroma Cacao, Gmelina Arborea and Secondary Forest) in Umuahia North of Abia State, Nigeria. Canadian Journal of Agriculture and Crops, [S. l.], v. 1, n. 1, p. 19–29, 2016. DOI: 10.20448/803.1.1.19.29. Disponível em: http://onlinesciencepublishing.com/index.php/cjac/article/view/366. Acesso em: 19 may. 2024.