Researches, which have lasted for two years, were carried out on long-term trial field at Rimski Šančevi, Novi Sad, Serbia. In this trial, the eight fertilization variants of N, P₂O₅ and K₂O increased amounts were studied. Sugar beet root and tops yields were determined, as well as the elements of technological sugar beet root quality. Based on these results, percentage of sugar utilization and refined sugar yield was defined.