@article{cardoso_berni_2012,  title={Nitrogen applied in okra under non-tightness grown and residual fertilization},  volume={30},  ISSN={0102-0536},  url={https://doi.org/10.1590/S0102-05362012000400014},  DOI={10.1590/S0102-05362012000400014},  number={4},  journal={Horticultura Brasileira},  publisher={Associação Brasileira de Horticultura},  author={Cardoso, Marinice O and Berni, Rodrigo F},  year={2012},  month={Oct},  pages={645–652} }