Enzyme activity and microbial biomass in an Oxisol amended with sewage sludge contaminated with nickel . Scientia Agricola, [S. l.], v. 64, n. 1, p. 61–67, 2007. DOI: 10.1590/S0103-90162007000100009. Disponível em: https://www.revistas.usp.br/sa/article/view/22234.. Acesso em: 4 may. 2024.