@article{costa_caputti_galzerano_silva_ruggieri_malheiros_2015,  title={Relative chlorophyll contents in the evaluation of the nutritional status
               of nitrogen from xaraes palisade grass and determination of critical nitrogen
               sufficiency index},  volume={37},  ISSN={1807-8672},  url={https://doi.org/10.4025/actascianimsci.v37i2.24854},  DOI={10.4025/actascianimsci.v37i2.24854},  number={2},  journal={Acta Scientiarum. Animal Sciences},  publisher={Editora da Universidade Estadual de Maringá - EDUEM},  author={Costa, João Paulo Ramos and Caputti, Gregory de Paula and Galzerano, Leandro and Silva, Wilton Ladeira da and Ruggieri, Ana Claudia and Malheiros, Euclides Braga},  year={2015},  month={Apr},  pages={109–114} }