Economic evaluation of fertilizer utilization and integrated practices for environmental sustainability and agricultural productivity in Sudan savannah zone, Nigeria. International Journal of Manures and Fertilizers, [S. l.], v. 2, n. 1, p. 343–348, 2013. Disponível em: https://www.ijpp.org/journal/index.php/ijmf/article/view/252. Acesso em: 5 apr. 2026.