Vinay-Vadillo, J.C., Enriquez-Quiroz, J.F., Montero-Lagunes, .M., Herrera-Sotero, .M.Y., Mendoza-Pedroza, S.I. y Bolaños-Aguilar, E.D. 2021. Critical Nitrogen and Nutritive Index in Cultivars of Cenchrus purpureus (Schumach) Morrone. Agro Productividad. 13, 12 (ene. 2021). DOI:https://doi.org/10.32854/agrop.v13i12.1903.