This investigation was established to determine the effect of planting dates, biofertilization treatments, N&K levels and their interactions on growth, yield, yield components and quality of sugar beet under the environmental conditions of Mansoura district.The main findings of this investigation were: 1-The optimum planting date that yielded the highest values of previous characters was planting sugar beet on 1st Oct. 2-Rhizobacterin treatment produced the highest values of most studied characteristics in all seasons.Application of Rhizobacterin + Cerialine ranked after Rhizobacterin...