Two field trials were carried out at Shandaweel Research Station (Sohag Governorate) in two successive growing seasons 1995/1996 and 1996/1997 to study the effect of twelve treatments which repre­sent the combination between two sowing dates (November 1st and No­vember, 15th), two irrigation intervals (7 and 14 days) and three nitro­gen levels (40, 60 and 80 Kg N/feddan) on yield and quality of sugar beet. A split-split plot design in four replications was used. The obtained results showed that non of the studied characters was significantly af­fected by the two sowing dates except top yield. Scheduling irrigation at 7-day intervals produced significantly higher root yield compared with that of 14-day intervals in the second season.lncreasing nitrogen level increased root diameter and root yield significantly, but decrease su­crose percentage significantly in the second season, thus sugar yield was not significantly increased in both seasons.