LUGO-LÓPEZ, M. A.; ABRAMS, R. High Yields of Non-fertilized Protein-rich Pigeon Peas on Tropical Soils of Low Inherent Fertility of Puerto Rico: An Explanation of a Paradox. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 65, n. 1, p. 21–28, 1981. DOI: 10.46429/jaupr.v65i1.7558. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/7558. Acesso em: 7 dec. 2022.