@article{carvalho_marchão_souza_bustamante_2014,  title={Soil fertility status, carbon and nitrogen stocks under cover crops and tillage regimes},  volume={45},  ISSN={1806-6690},  url={https://doi.org/10.1590/S1806-66902014000500007},  DOI={10.1590/S1806-66902014000500007},  number={5spe},  journal={Revista Ciência Agronômica},  publisher={Universidade Federal do Ceará},  author={Carvalho, Arminda Moreira de and Marchão, Robélio Leandro and Souza, Kleberson Worslley and Bustamante, Mercedes Maria da Cunha},  year={2014},  pages={914–921} }