Ritchey, Kenneth Dale, Raymond F. Cerkauskas, José Euripedes da Silva, and Lourival Vilela. 2014. “Residual Effects of Potassium and Magnesium on Soybean Yield and on Disease Incidence in a Cerrado Dark-Red Latosol”. Pesquisa Agropecuaria Brasileira 22 (8):825-32. https://doi.org/10.1590/S1678-3921.pab1987.v22.14881.