Abruña Rodríguez, Fernando, Juan Juárez, Raúl Pérez Escolar, and José Vicente Chandler. “Effect of Soil Acidity and Liming on Yields and Composition of Sugarcane Growing on an Ultisol”. The Journal of Agriculture of the University of Puerto Rico 52, no. 2 (April 1, 1968): 85-100. Accessed December 4, 2021. https://revistas.upr.edu/index.php/jaupr/article/view/11496.