الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
plants grown under such conditions.
The experiments were carried out in a split plot design in which
the boron levels, i.e. (BI), I ppm; (B2), 4 ppm; (B3), 7 ppm; and (B4),
10 ppm occupied the main plots whereas the sulphur levels, i.e. (So),
without sulphur application, (SI), 0.25 ton/fed.; and (S2), 0.5 ton/fed.
occupied the submain plots.
Sugar beet seeds (Beta vulgaris L.) var. Desperz poly N, at the
rate of 5 kg/fed. was the tested crop.
All plots received N, P, and K at the rates of 70, 24 and 60
units/fed., respectively.
Surface irrigation from well was applied every week after the
addition of boron levels in the form of boric acid. Also, the necessary
management practices were conducted at the appropriate time. The
crop was harvested at maturity and the yield of roots and leaves were
recorded in which the Biochemical composition and nutrients content
were determined for each season.
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Soil samples were taken at the end of harvesting each seasons
from equal depths of 0-5, 5-15 and 15-30 cm depth for the chemical
analysis.
The obtained results can be summarized as follows:
1- The application of sulphur resulted in decreasing soil pH, EC,
SAR and ESP values with different magnitudes. Also, the
concentrations of soluble Ca+Mg, Na, K, and Cl were remarkably
decreased. whereas the concentrations of soluble SO” and HCOJ
ions were increased with increasing sulphur application rates.
However, boron application led to increase the EC, SAR and ESP
values as well as the concentrations of soluble Ca+Mg, Na, K,
HC03, Cl and S04.
2- Total and water soluble boron concentrations increased with
different magnitudes as a result of increasing boron level of the
applied saline water, while the application of sulphur reduced such
ions concentration.
On the other hand, the sulphur-boron interaction indicated the
positive role of sulphur on creating the hazards previously
mentioned for boron.
3. The availability of Fe, Mn and Zn was increased as a result of
sulphur and/or boron applications. The rate of increment was
dependent upon the rate of sulphur and/or boron to be the highest
under the S2B4treatment in the two growing seasons.
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4. The yield of sugar beet roots and leaves significantly increased as
a result of sulphur or boron application. However, the effect of
combined treatments of sulphur and boron was not significant.
5. The nutrient contents, i.e. N, P, K, Ca and S04 of both roots and
leaves were increased whereas Mg and Na contents were
decreased due to increasing sulphur application rates. The same
trends were also obtained except that the content of Na was
increased whereas the S04-S contents of both root and leaves were
decreased due to boron application.
6. Increasing boron levels in water caused a gradual increase in
boron content of both roots and leaves while the application of
sulphur reduced such nutrient.
7. The micronutrients contents of Fe, Mn, Zn were increased in both
roots and leaves of the two growing seasons due to sulphur and/or
boron applications, the rate of increment was dependnt upon the
rate of S or/and B application.
8. The total soluble solids (TSS), sugar yield and juice purity of
roots were affected favourably by sulphur and/or boron
applications.
9. The soluble sugars, i.e. total, reducing and non reducing sugars of
both roots and leaves were increased as a result of increasing
sulphur application rates, while boron application increased both
total and non reducing sugars of roots.
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10. The total protein of both roots and leaves increased as a result of
increasing rates of both sulphur and/or boron applications.
11. The proline content of sugar beet leaves increased by boron
application. However the application of sulphur reduced such
parameter.