Mauad, M. et al. 2013. Silicon content in the shoots of upland rice cultivars as affected by the application of silicate and limestone in the soil. Semina: Ciências Agrárias. 34, 5 (Oct. 2013), 2049–2060. DOI:https://doi.org/10.5433/1679-0359.2013v34n5p2049.