@article{nava_ernani_sá_pereira_2012,  title={Soil composition and nutritional status of apple as affected by long-term application of gypsum},  volume={36},  ISSN={0100-0683},  url={https://doi.org/10.1590/S0100-06832012000100022},  DOI={10.1590/S0100-06832012000100022},  number={1},  journal={Revista Brasileira de Ciência do Solo},  publisher={Sociedade Brasileira de Ciência do Solo},  author={Nava, Gilberto and Ernani, Paulo Roberto and Sá, Alessandra Aparecida de and Pereira, Adilson José},  year={2012},  month={Jan},  pages={215–222} }