Results of testing the performance of sugar beet varieties and the effectiveness of the bioregulator Rastim 30 DKV in the conditions of the East Slovak lowlands

analytical methods application foliaire beet sugar beta vulgaris crop yield date de semis ensayos de variedades fecha de siembra foliar application harvesting date lowland periodo vegetativo peso plant growth substances poids racine rendement des cultures rendimiento de cultivos roots slovak republic sowing date sucre de betterave sustancias de crecimiento vegetal technique analytique tierras bajas variedades varieties variety trials vegetative period weight