LUGO-LÓPEZ, M. A.; PÉREZ-ESCOLAR, R. Attempts to Explain the Variability in the Cation-Exchange Capacity of Soils in Terms of Particle Size and Organic-Matter Levels. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 53, n. 4, p. 369–373, 1969. DOI: 10.46429/jaupr.v53i4.11150. Disponível em: Acesso em: 23 mar. 2023.