This investigation was conducted at El-Manyal Village, Talkha District, Dakahlia Governorate, during 2012/2013 and 2013/2014 seasons to study the effect of ploughing depth (0.0, 10, 20 and 30 cm), phosphorus fertilizer levels (0.0, 15.5 and 31.0 kg P₂O₅/fad) and thinning dates (at 20, 30 and 40 days after sowing) on productivity and quality of sugar beet "variety Kawemira".  A split-plot design with four replicates was used for each ploughing depth during the two seasons (each ploughing depth was considered as a separate experiment). The main results of this investigation could be summarized as follows: 1- Increasing ploughing depths from 0.0 up to 30 cm significantly increased root fresh weight, root length, total soluble solids percentage (TSS %) as well as root and sugar yields/faddan. On the other hand, it significantly decreased root juice purity percentage in both seasons.    2- Increasing phosphorus fertilizer levels from 0.0 to 15.5 and 31.0 kg P₂O₅/fad, significantly increased all studied characters in both seasons. 3- Delaying thinning dates from 20 to 30 and 40 days after sowing markedly decreased all studied characters, except root diameter in both seasons. 4- The interactions among studied factors showed insignificant effects, except for the effect of the interaction between ploughing depth and phosphors fertilizer levels on root length in the first season and sugar yield/fad in the second season.              Increasing ploughing depth to be 30 cm, adding 31.0 kg P₂O₅/fad and thinning at the age of 20 days was the suitable recommendation to maximize sugar beet root yield and quality under the environmental conditions of Dakahlia Governorate.