KAILA, A. Fixed ammonium in some Finnish soils. Agricultural and Food Science, [S. l.], v. 38, n. 1, p. 49–58, 1966. DOI: 10.23986/afsci.71651. Disponível em: https://journal.fi/afs/article/view/71651. Acesso em: 29 nov. 2024.