SAMUELS, George. The Efficiency of Sugarcane in its Use of Nitrogen Fertilizer Applications. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 40, n. 4, p. 209–217, 1956. DOI: 10.46429/jaupr.v40i4.12632. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/12632. Acesso em: 22 dec. 2024.