NISKANEN, R. Release of phosphorus, aluminium and iron in fractionation of inorganic soil phosphorus . Agricultural and Food Science, [S. l.], v. 59, n. 2, p. 141–145, 1987. DOI: 10.23986/afsci.72256. Disponível em: https://journal.fi/afs/article/view/72256. Acesso em: 19 may. 2024.