Critical Nitrogen and Nutritive Index in Cultivars of Cenchrus purpureus (Schumach) Morrone. Agro Productividad, [S. l.], v. 13, n. 12, 2021. DOI: 10.32854/agrop.v13i12.1903. Disponível em: https://revista-agroproductividad.org/index.php/agroproductividad/article/view/1903. Acesso em: 17 may. 2026.