ABRUÑA, Fernando; VICENTE-CHANDLER, José. Effects of Six Sources of Nitrogen on Yields, Soil Acidity, and Leaf Composition of Coffee. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 47, n. 1, p. 41–46, 1963. DOI: 10.46429/jaupr.v47i1.12933. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/12933. Acesso em: 19 apr. 2024.