Sotomayor-Ramírez, David, Gustavo A. Martínez, Luis Pérez-Alegría, and John Ramírez-Ávila. 2006. “Off-Field Transport of Phosphorus from an Ultisol under Pasture”. The Journal of Agriculture of the University of Puerto Rico 90 (3-4):159-72. https://doi.org/10.46429/jaupr.v90i3-4.1004.