Silva, T.R.B. da, Soratto, R.P., Ozeki, M. and Arf, O. 2008. Potassium management in upland rice sprinkler irrigation. Acta Scientiarum. Agronomy. 24, (Apr. 2008), 1455-1460. DOI:https://doi.org/10.4025/actasciagron.v24i0.2401.