MÄKELÄ-KURTTO, R.; SIPPOLA, J. Monitoring of Finnish arable land: changes in soil quality between 1987 and 1998. Agricultural and Food Science, [S. l.], v. 11, n. 4, p. 273–284, 2002. DOI: 10.23986/afsci.5730. Disponível em: https://journal.fi/afs/article/view/5730. Acesso em: 5 may. 2024.