Samuels, G., S. Alers-Alers, and P. Landrau, Jr. “The Application of Fertilizers in Relation to the Handling of Sugarcane Trash”. The Journal of Agriculture of the University of Puerto Rico 44, no. 2 (April 1, 1960): 87–91. Accessed April 24, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/12097.