Humic substances isolated from residues of sugar cane industry as root growth promoter . Scientia Agricola, [S. l.], v. 67, n. 2, p. 206–212, 2010. DOI: 10.1590/S0103-90162010000200012. Disponível em: https://www.revistas.usp.br/sa/article/view/22569.. Acesso em: 17 jun. 2024.