@article{souza_rezende_freitas_gonçalves_rezende_2015,  title={Dry matter production and macronutrient leaf composition in lettuce under fertigation with nitrogen, potassium and silicon},  volume={19},  ISSN={1415-4366},  url={https://doi.org/10.1590/1807-1929/agriambi.v19n12p1166-1171},  DOI={10.1590/1807-1929/agriambi.v19n12p1166-1171},  number={12},  journal={Revista Brasileira de Engenharia Agrícola e Ambiental},  publisher={Unidade Acadêmica de Engenharia Agrícola},  author={Souza, Renan S. de and Rezende, Roberto and Freitas, Paulo S. L. de and Gonçalves, Antonio C. A. and Rezende, Graziela S.},  year={2015},  month={Dec},  pages={1166–1171} }