KAILA, A.; KIVINEN, P. Observations on the effect of organic materila upon aggregation and nitrate-nitrogen content of soil. Agricultural and Food Science, [S. l.], v. 24, n. 3, p. 127–134, 1952. DOI: 10.23986/afsci.71323. Disponível em: https://journal.fi/afs/article/view/71323. Acesso em: 27 sep. 2024.