Two field experiments were conducted at Sakha, Kafer ElSheikh, Governorate in 2009/2010 and 2010/2011 seasons to evaluate
five multigerm sugar beet varieties sown at three sowing dates (1st
September, 1st October and 1st November). The tested sugar beet
varieties were imported from Germany (Del 937 and Carolla), France
(LP13), Netherlands (Samba) and Sweden (Baraca). Split plot design
with four replicates was applied in both seasons. Sowing dates were
arranged in the main plots and varieties in the sub plots. The results
indicated that sowing sugar beet on the 1st of October significantly
surpassed the other two dates in root length, diameter and fresh weight,
sucrose% as well as root and sugar yields/fed., while impurities% in
roots (α- amino N, K and Na%) were increased by delaying sowing
date up to the 1st of November in both seasons. The tested sugar beet
varieties differed significantly in root length, diameter and fresh
weight, sucrose%, root and sugar yields/fed., and impurities% in both
seasons. Carolla variety was the best one where it gave the highest root
and sugar yields/fed. The interaction between the three sowing dates
and five varieties had a significant effect on sucrose%, root and sugar
yields. Sowing Carolla variety on the 1st October was recommended for
cultivation in Kafer EL-Sheikh as it gave the highest sucrose%, as well
as sugar and root yields/fed in both seasons.