@article{assis_guimarães_colombo_scalco_dominghetti_2015,  title={Critical ranges for leaf nitrogen and potassium levels in coffee fertigated at the production phase<sup>1</sup>},  volume={46},  ISSN={1806-6690},  url={https://doi.org/10.1590/S1806-66902015000100015},  DOI={10.1590/S1806-66902015000100015},  number={1},  journal={Revista Ciência Agronômica},  publisher={Universidade Federal do Ceará},  author={Assis, Gleice Aparecida de and Guimarães, Rubens José and Colombo, Alberto and Scalco, Myriane Stella and Dominghetti, Anderson William},  year={2015},  month={Jan},  pages={126–134} }