Velloso, A.C.X. et al. 2014. Cation exchange capacity and phosphate adsortion of soils under "Cerrado" (savannah) vegetation of Amapá/Amazonian region. Pesquisa Agropecuaria Brasileira. 17, 1 (Apr. 2014), 27–32. DOI:https://doi.org/10.1590/S1678-3921.pab1982.v17.15511.