SOTOMAYOR-RAMÍREZ, D.; MARTÍNEZ, G. A. The status of phosphorus and other fertility parameters in soils of Puerto Rico. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 90, n. 3-4, p. 145–157, 2006. DOI: 10.46429/jaupr.v90i3-4.1003. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/1003. Acesso em: 30 jun. 2022.