Frazão, L.A. et al. 2008. Soil chemical properties in a Typic Quartzipisamment under different management systems in Brazilian savanna in Mato Grosso State, Brazil. Pesquisa Agropecuaria Brasileira. 43, 5 (Sep. 2008), 641–648. DOI:https://doi.org/10.1590/S1678-3921.pab2008.v43.29.