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Neves, O. S. C.; Carvalho, J. G. de; Martins, F. A. D.; Pádua, T. R. P. de; Pinho, P. J. de. Use of SPAD-502 in the Evaluation of Chlorophyll Contents and Nutritional Status of Herbaceous Cotton to Nitrogen, Sulphur, Iron and Manganese. PAB 2005, 40 (5), 517-521. https://doi.org/10.1590/S1678-3921.pab2005.v40.6987.