الفهرس 
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Abstract
SUMMARY
Seven profiles were taken from the area of EIQaa Plain,
Sinai Peninsula. There were 34 layers identified in those
profiles. The profiles were described, and field
determination of the rate of water infiltration was
conducted. Soil samples were ,analysed for the following :
salinity, soluble cations and anions, texture, clay (c),
silt (si), coarse sand (ca), fine sand (fs), caCo3, organic
matter (om), cation exchange capacity (CEC), exchangeable
50duim percent (ESP), porosity including distribution of
pore size. Quickly drainable pores (ODP), >28.8 u9i slowly
drainable pores (SOP), 28.8 - 8.62 u¢i water-holding pores
(WHP), 8.62 - 0.19 u 14; and nonuseful pores (NUP), <0.19 u~
were all determined. Field capacity·FC, and wilting point
(WP), were determined and t:hedifference between them ( avai1able
water ”AWl ) was calculated. Moisture retention curves
relating moisture at tensiclOsof 0, 0.1, 0.33, 0.66, 1.00,
and 15.00 bars were prepared. Some other properties
including pH, a~d hydraulic conductivity (HC) were also
determined.
and
Effect of soil properties on moisture
infiltration were assessed llainly
constants,
~y carrying
HC,
out
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correlation analysis, relating those properties to the soil
water parameters.
FC and WP as well as He showed close relation with a
number of soil properties i.e. fs, cs, si, c, Caco3, om,
NUP, and QOP. Values of ”r’t (correlat ion coeff icient) for
each water constant related with each of the above
prperties, respectively, are as follows
FC -0.469 **,
•.*.”. 0.569 ,
-0.815 ***, 0.856 ***, 0.897 ***, 0.416 **,
0.934 ***, and -0.722 **
-0.841 ***, 0.892 ***, 0.948 ***, 0.500 **,
0.969 ***, and -0.605 ***
0.841 .**, -0.814 ***, -0.845 ***, -0.481 **,
WP -0.485 **,
0.608 *** ,
He ns ,
-0.412 * , -0.819 ***, and -0.484 **
Available water (AW) was correlated significantly only
with porosity; with r values of 0.889 ***, 0.535 **, and
*** 0.602 relating to WHP, SDP, and QDP respectively.
caso.• only affecbed He (r = -0.443 ** ). Infiltration
rate ranged between 0.t7 to 15.20 cmlh and was greater with
lighter soi Is which p05:ses more QDP. Moisture curves were
smooth in heavy so i l:s• Moisture contents showed the
following ranges
FC .. 6.3 - 48.1’ w/w, 4.6 - 40.5% w/w,
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AW 1.8 - 13.6% w/w.
Hydraulic conductivity He ranged from 0.7 to 11.4 cm/h,
and basic infiltration rate ranged from 0.47 to 15.2 em/h.
The most important factor affecting all of the moisture
parmeters and the soil-water relationship constants is
porosity, particularly pore size distribution. It was the
only parameter affecting AW. The indirect effect of
constituentslike clay on AW was not obtained in the light of
the majority of the salls being structureless. The soils
were either massive of single grain; the only profile with
natural peds was the clay one, with platy or subangular
structure.
•
One profile was clay, another was a sandy clay loam
over loamy sand and five were mainly sands to loamy sands.