ASSESSMENT OF PRODUCTIVITY STATUS OF VERTISOLS IN SUDAN SAVANNA ZONE OF NIGERIA. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 3, n. 4, p. 553–561, 2023. Disponível em: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/1685. Acesso em: 12 sep. 2025.