DEL VALLE-GONZÁLEZ, Reinaldo; SANTIAGO-CÓRDOVA, Miguel. Nitrogen rates and sources and Guinea Negro yam in an Ultisol in Puerto Rico. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 74, n. 1, p. 29–35, 1990. DOI: 10.46429/jaupr.v74i1.6525. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/6525. Acesso em: 19 apr. 2024.