Muller, M. M. L., Guimarães, M. de F., Desjardins, T., & Martins, P. F. da S. (2001). Pasture degradation in the Amazon region: soil physical properties and root growth. Pesquisa Agropecuaria Brasileira, 36(11), 1409–1418. https://doi.org/10.1590/S1678-3921.pab2001.v36.6274