Five sugar beet cultivars and three levels of foliar treatments (control, Humix universal plus and Biafit Gold) were examined in the field trial without irrigation founded in the years 2005-2007 on experimental base of Slovak University of Agriculture in Nitra in Dolna Malanta. The influence of weather condition on all the observed parameters was statistically highly significant. The used bioactive leaf preparations increased root yield, digestion and refined sugar content. Biafit Gold had positive impact on root yield and Humix universal plus on digestion and refined sugar content (statistically not significant). Cultivar had statistically high significant influence on all the observed parameters.