KAILA, A.; RYTI, R. Calcium, magnesium and potassium in clay, silt and fine sand fractions of some Finnish soils. Agricultural and Food Science, [S. l.], v. 40, n. 1, p. 1–13, 1968. DOI: 10.23986/afsci.71693. Disponível em: https://journal.fi/afs/article/view/71693. Acesso em: 19 jul. 2024.