@article{paiva_cantarutti_guimarães_silva_2012,  title={Urea coated with oxidized charcoal reduces ammonia volatilization},  volume={36},  ISSN={0100-0683},  url={https://doi.org/10.1590/S0100-06832012000400016},  DOI={10.1590/S0100-06832012000400016},  number={4},  journal={Revista Brasileira de Ciência do Solo},  publisher={Sociedade Brasileira de Ciência do Solo},  author={Paiva, Diogo Mendes de and Cantarutti, Reinaldo Bertola and Guimarães, Gelton Geraldo Fernandes and Silva, Ivo Ribeiro da},  year={2012},  month={Jul},  pages={1221–1230} }