Valpassos, M. A. R., Cavalcante, E. G. S., Cassiolato, A. M. R., & Alves, M. C. (2001). Effects of soil management systems on soil microbial activity, bulk density and chemical properties. Pesquisa Agropecuaria Brasileira, 36(12), 1539–1545. https://doi.org/10.1590/S1678-3921.pab2001.v36.6288