ABSTRACT Portable chlorophyll meters can be used to improve the prediction of nitrogen (N) doses for common bean. This study aimed evaluate two (Minolta SPAD-502 and ClorofiLOG CFL 1030) predict topdressing N Pérola, TAA Gol BRSMG Uai cultivars VR 20 line. Eight field experiments (four genotypes devices) were carried out in a randomized blocks design, with four replicates, being treatments appl...