Silva, Filomena Leonor Ilharco Morgado da, et al. “Potassium Uptake by Sweet Corn Predicted by a Simulation Model”. Pesquisa Agropecuaria Brasileira, vol. 26, no. 3, Mar. 1991, pp. 431-8, doi:10.1590/S1678-3921.pab1991.v26.3359.