Two field experiments were carried out at the Research Experimental Farm
of Sabahia Agricultural Research Station in Alexandria during the two successive growing
seasons of 2011/ 12 and 2012/ 13. BTS 303 genotype sugarbeet was cultivated to investigate
the effect of three sowing dates (15 Sept., 15 Oct.,and 15 Nov.); three plant spacing between
hills (15, 25 and 35 cm.).and three nitrogen levels ( 60, 90 and 120 kg N / Fed. as ammonium
nitrate 33.5%N ) which were added on two equal doses before 1st, and 2nd, irrigation on
sugarbeet yield and Quality. The result indicated that:
Root ,fresh top , sugar yield T.S.S.% , sucrose % and purity% were superior due to 25 cm
between hills. In both seasons, root and sugar yield were significantly decreased by planting in
the date on15 Oct.. Root, fresh top ,sugar yield ,T.S.S.% and sucrose % of sugarbeet root were
significantly increased by increasing nitrogen levels from 60 up to 90 N kg / fed. There were a
significant interaction of sowing dates and distances between hills with regard to root
yield(t./fed) and purity % in both seasons, while on T.S.S.% and sucrose % in the first season.
Statistically significant effect of sowing dates, plant spacing between hills and nitrogen
fertilizers levels, on root yield (t./fed) and purity % in both seasons and their combined
analysis.
Generally, as a conclusion and on the basis of the obtained results that planting BTS 303
sugarbeet on (25 cm between hills) ,sowing on October and. 90 kg N/ fed at two equal doses
before 1st, and 2nd, irrigation produced the highest yield and quality under Alexandria conditions.