@article{mauad_crusciol_grassi filho_corrêa_2003,  title={Nitrogen and silicon fertilization of upland rice},  volume={60},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90162003000400023},  DOI={10.1590/S0103-90162003000400023},  number={4},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Mauad, Munir and Crusciol, Carlos Alexandre Costa and Grassi Filho, Hélio and Corrêa, Juliano Corulli},  year={2003},  month={Oct},  pages={761–765} }