Background levels of some trace elements in weathered soils from the Brazilian Northern region . Scientia Agricola, [S. l.], v. 67, n. 1, p. 53–59, 2010. DOI: 10.1590/S0103-90162010000100008. Disponível em: https://revistas.usp.br/sa/article/view/22549.. Acesso em: 17 jul. 2024.