NISKANEN, R. Number of extractionsin determination of effective cation-exchange capacity . Agricultural and Food Science, [S. l.], v. 58, n. 2, p. 47–51, 1986. DOI: 10.23986/afsci.72220. Disponível em: https://journal.fi/afs/article/view/72220. Acesso em: 23 nov. 2024.