PESSI, Y. The effect of nitrogen fertilization on the humification of the peat in cultivated Sphagnum bogs. Agricultural and Food Science, [S. l.], v. 34, n. 1, p. 41–43, 1962. DOI: 10.23986/afsci.71588. Disponível em: https://journal.fi/afs/article/view/71588. Acesso em: 3 may. 2024.