“…Five potato cultivars developed by the Embrapa's Breeding Program were analyzed, which have the following characteristics: 'Macaca', early maturity (85 to 90 days), low vigor plants, upright growth habit, and tubers with medium-low dry mass content (Pereira et al, 2003); 'BRS Ana', late maturity (110 to 120 days), vigorous plants, upright growth habit, and tubers with medium dry mass content (Pereira et al, 2010); 'BRS Clara', medium maturity (100 to 105 days), semi-upright plant growth habit, medium size, and tubers with medium dry mass content (Pereira et al, 2013); 'BRSIPR Bel', medium maturity (110 days), semi-upright plant growth habit, medium size, and tubers with medium to high dry mass content; 'BRS F63' (Camila), medium maturity (100 to 105 days), medium vigorous plants and semi-upright growth habit, and tubers with medium dry mass content (Pereira et al, 2018) The soil of the field is classified as Eutrophic Red-Yellow Argisol. The chemical analysis of the arable layer (0-20 cm) prior to planting resulted in: pH (H 2 O)= 5.6; SMP index= 6.4; clay= 18%; organic matter= 1.4% (m/v); K= 113 mg dm -3 ; P= 25.6 mg dm -3 ; Al= 0.0 cmol c dm -3 ; Ca= 2.2 cmol c dm -3 ; Mg= 1.1 cmol c dm -3 .…”