@article{wadt_2005,  title={Relationships between soil class and nutritional status of coffee plantations},  volume={29},  ISSN={0100-0683},  url={https://doi.org/10.1590/S0100-06832005000200008},  DOI={10.1590/S0100-06832005000200008},  number={2},  journal={Revista Brasileira de Ciência do Solo},  publisher={Sociedade Brasileira de Ciência do Solo},  author={Wadt, Paulo Guilherme Salvador},  year={2005},  month={Apr},  pages={227–234} }