الفهرس 
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Abstract
Two field experiments were carried out during 2008/09 and 2009/10
growing seasons at Sakha Agricultural Research Station, Kafr El-sheikh
governorate to study the effect of potassium and boron fertilization on
yield and quality of sugar beet crop under different irrigation intervals in
north delta region. The spilt- split plot design with three replicates was
used. The irrigation intervals (as main plots) were every 3, 5 and 7 weeks.
The three potassium fertilizer rates were 24, 36 and 48 kg k2o/fed. (as sub
plots), whereas the three foliar boron levels (0.5, 1 and 1.5 kg H3Bo3/fed.)
were arranged in the sub-sub-plots.
The obtained results showed that increasing the drought period
(irrigation every 3 weeks) resulted in a significant increase in root length,
root/top ratio, gross sugar percentage and white sugar percentage at
harvest, while decrease root and top yield/fed. but the soluble non-sugar
content, gross and white sugar yield (ton/fed.), loss sugar yield were
affected by different irrigation intervals.
With respect to potassium fertilizer, increasing its level from 24 to
48 kg K2O/fed. led to significant increases in all studied traits except in
case of Na and -amino nitrogen content in beet root.
The increase of boron level up to 1.5 kg H3BO3/fed. increased root
fresh weight/plant, sucrose percentage, extractable sugar percentage as
well as yield of root, top and sugar/fed. but significantly decreased juice k
content in both seasons.