UUSITALO, R.; TUHKANEN, H.-R. Phosphorus saturation of Finnish soils: evaluating an easy oxalate extraction method. Agricultural and Food Science, [S. l.], v. 9, n. 1, p. 61–70, 2000. DOI: 10.23986/afsci.5647. Disponível em: https://journal.fi/afs/article/view/5647. Acesso em: 23 nov. 2024.