Muller, Marcelo Marques Lopes, Maria de Fátima Guimarães, Thierry Desjardins, and Paulo Fernando da Silva Martins. 2001. “Pasture Degradation in the Amazon Region: Soil Physical Properties and Root Growth”. Pesquisa Agropecuaria Brasileira 36 (11):1409-18. https://doi.org/10.1590/S1678-3921.pab2001.v36.6274.