Nunes, W. de O. et al. 2014. Cassava responses on mineral fertilization and methods of potassium application in low fertility soils. Pesquisa Agropecuaria Brasileira. 9, 9 (Apr. 2014), 1–9. DOI:https://doi.org/10.1590/S1678-3921.pab1974.v9.17240.