@article{cavalcanti_zuba junio_sampaio_carneiro_oliveira_rodrigues_2015,  title={Yield of castor bean fertilized with sewage sludge and potassium and magnesium sulphate},  volume={19},  ISSN={1415-4366},  url={https://doi.org/10.1590/1807-1929/agriambi.v19n8p773-779},  DOI={10.1590/1807-1929/agriambi.v19n8p773-779},  number={8},  journal={Revista Brasileira de Engenharia Agrícola e Ambiental},  publisher={Unidade Acadêmica de Engenharia Agrícola},  author={Cavalcanti, Thâmara F. M. and Zuba Junio, Geraldo R. and Sampaio, Regynaldo A. and Carneiro, João P. and Oliveira, Ely S. A. de and Rodrigues, Márcio N.},  year={2015},  month={Aug},  pages={773–779} }