The results of the trials carried out in the ČSFR for several years show that the yield potential of hybrids is under average growing conditions realized to 40-50%. The best growers reach the realization up to 70%. The maximum utilization represents 95% of the corresponding achene yield of 4.5 t/ha. By breeding for increase of the stand yield potential the achene yield up to 6.3 t/ha can be reached i.e., 3 t/ha of oil. This represents an increase of the present yield potential, of 140%. The optimum stand density varies according to the locality, soil texture, type of hybrid and sometimes according to the level of nutrition and management from 50 000 to 75 000 individuals per hectare, at the medium optimum 60-65 000 and yield per area (yield potential) up to 5.5 t/ha in experimental fields and 4.5 t/ha in production fields. Higher stand productivity is connected with the increase of individuals per area. However, plants toleranting increase of density have to posses progressive traits.