MÄNTYLAHTI, V. Determination of plant-available manganese in Finnish soils . Agricultural and Food Science, [S. l.], v. 53, n. 7, p. 391–508, 1981. DOI: 10.23986/afsci.72083. Disponível em: https://journal.fi/afs/article/view/72083. Acesso em: 14 oct. 2024.