Crespo, Gustavo, I. Rodríguez, and Sandra Lok. “Contribution to the Study of Soil Fertility and Its Relation to Pastures and Forages Production”. Cuban Journal of Agricultural Science 49, no. 2 (February 25, 2016). Accessed January 10, 2025. https://mail.cjascience.com/index.php/CJAS/article/view/536.