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