Tow field experiments were conducted during 2008/2009 and 2009/2010 seasons at Sakha Agricultural Research Station , Kafer El-Sheikh, Governorate, Egypt, to study the effect of phosphorus treatments:  30 kg P₂O₅ and 300 and 600g/fed of phosphorin , Bucillus sp, ( phosphate dissolving bacteria ) and nitrogen treatments : ( 100 kg N, Azotobacter sp +60 or 80 kg N/fed, Azospirillum sp + 60 or 80 kg N/fed, Azoto. + Azosp. + 60 or 80 kg N/fed on yield and quality traits of sugar beet.  A split plot design with four replications was used with P treatments in the main plots and N treatments in the sub plots. Results revealed that application of 30 kg P₂O₅ produced the highest root fresh weight, plant dry weight, LAI, yields of roots, sugar and tops and improved juice quality traits in terms of TSS%, sucrose%, purity%, and recoverable sugar %, followed by phosphorin at the rate of 600g and 300 g/fed in a descending order. On the other hand biophosphatic fertilizer decreased sucrose loss to molasses. Application of 100 kg mineral N/fed produced the highest growth traits followed by Azot. + Azosp. with 80 kgN/fed. The highest values of TSS%, sucrose%, and recoverable sugar resulted from either Azoto. or Azosp.+ 60kgN/fed. Increasing N rates from 60 to 80 kg/fed in combination with N fixing bacteria depressed beet quality and increased impurities in beet roots. The highest root and top yields resulted from 100 kg N/fed, while sugar yield was highest with the combination of Azto. + Azosp. With 60 or 80 kg  N /fed followed by 100 kg N/fed.