@article{moura_dutra_grangeiro_sousa_2018,  title={Organic residue with high potassium content on sunflower cultivars},  volume={49},  ISSN={1806-6690},  url={https://doi.org/10.5935/1806-6690.20180075},  DOI={10.5935/1806-6690.20180075},  number={4},  journal={Revista Ciência Agronômica},  publisher={Universidade Federal do Ceará},  author={Moura, Maria da Conceição Freitas and Dutra, Alek Sandro and Grangeiro, Darlene Maia and Sousa, Wesley do Nascimento},  year={2018},  month={Oct},  pages={663–672} }