Vidigal, S. M., Lopes, I. P. de C., Puiatti, M., Ribeiro, M. R. de F., & Sediyama, M. A. N. (2018). SPAD index in the diagnosis of nitrogen status in cauliflower as a function of nitrogen fertilization. Científica, 46(3), 307–314. https://doi.org/10.15361/1984-5529.2018v46n3p307-314