PESSI, Y. The pH-reaction of the peat in long-term soil improvement and fertilizing trials at the Leteensuo experimental station. Agricultural and Food Science, [S. l.], v. 34, n. 1, p. 44–54, 1962. DOI: 10.23986/afsci.71589. Disponível em: https://journal.fi/afs/article/view/71589. Acesso em: 3 may. 2024.