Heavy metals and yield of cowpea cultivated under composted tannery sludge amendment. Acta Scientiarum. Agronomy, [S. l.], v. 36, n. 4, p. 443–448, 2014. DOI: 10.4025/actasciagron.v36i4.18094. Disponível em: https://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18094. Acesso em: 31 maio. 2026.