Alcântara, M.A.K. de and Camargo, O.A. de 2011. Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges. Pesquisa Agropecuaria Brasileira. 45, 1 (Jan. 2011), 81–88. DOI:https://doi.org/10.1590/S1678-3921.pab2010.v45.1723.