VÉLEZ-RAMOS, A.; STANDIFER, L. Effect of Organic Matter and Moisture Level on Extractable Soil Manganese. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 61, n. 2, p. 115–125, 1977. DOI: 10.46429/jaupr.v61i2.10448. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/10448. Acesso em: 17 jul. 2024.