C. A. Rosolem, J. Nakagawa, and J. R. Machado, “Soybean potassic fertilization in a Dark-Red Latosol sandy loam”, PAB, vol. 19, no. 11, pp. l319–1326, Apr. 2014, doi: 10.1590/S1678-3921.pab1984.v19.16149.