Alves, A. C., Brauner, J. L., Cordeiro, D. S., Zonta, Élio P., & Correa, L. A. V. (2014). Potassium, calcium and magnesium nutritional requirements of sweet sorghum. Pesquisa Agropecuaria Brasileira, 23(5), 529–536. https://doi.org/10.1590/S1678-3921.pab1988.v23.13915