@article{mendes_boechat_gualberto_barbosa_silva_saraiva_sena_duarte_2021,  title={Soil spectral library of Piauí State using machine learning for laboratory analysis in Northeastern Brazil},  volume={45},  ISSN={0100-0683},  url={https://doi.org/10.36783/18069657rbcs20200115},  DOI={10.36783/18069657rbcs20200115},  journal={Revista Brasileira de Ciência do Solo},  publisher={Sociedade Brasileira de Ciência do Solo},  author={Mendes, Wanderson de Sousa and Boechat, Cácio Luiz and Gualberto, Adriano Venicius Santana and Barbosa, Ronny Sobreira and Silva, Yuri Jacques Agra Bezerra da and Saraiva, Paloma Cunha and Sena, Antonny Francisco Sampaio de and Duarte, Lizandra de Sousa Luz},  year={2021},  pages={e0200115} }