To carry out this study, 12 soil profiles were selected and prepared, and soil
samples were collected from the different horizons (surface, subsurface, and C
horizon) in each profile. The results of the analyzed samples indicate that,
topographica
l factors plays an important role in determining some feature,
such as, the depth of the profile, texture, distribution of CaCO3 and the process
of swelling and the shrinking. Concerning the soil fertility, the study showed
that the soil content of microelements is ranging between moderate to low, thus
may be related to the mineralogical composition of the parent material,
weathering status, and to the use of these elements by the plants during the long
lasting exploitation of these soil without any restitution of these element. The
results indicate as well, the decrease of these elements with decreasing
elevation, i.e from the slop to the plain, this probably due to the relation
between the leaching process and topographical position, and to lesser extend to
the (pH) of the soil.
Seventh sector is located on the right bank of the Euphrates River at the town of Abu-
Kamal, the Syrian-Iraq border, and its square 18140 hectares. Invest most heavily sector
too, where crops depend on irrigation, irrigation networks mediated cons
isting of earthen
trenches, canals and to pump water by pumps on the banks of the Euphrates.
Research aims to assess the pedelogical properties of agricultural soils by using laboratory
and field tests: leaching speed, permeability, density, porosity, water field capacity, natural
humidity (hygroscopic– wilt limit), so as to contribute in choosing optimal modalities for
irrigation and drainage, and rehabilitation Land affected by salinity and exited the
investment.
The soils of the sector are clay, clayey sand, fine sand, and it has low permeability, low
water field capacity because of sedimentary origin, and the total porosity is low in the
upper part of subsurface soil because of its impaction. There is a relationship between
hygroscopic moisture of soils and its structural composition. The search recommend to
agriculture Fabaceae crops with different roots deep to help improve soil building, and
need to use spray irrigation method to control the water quantity and wetting depth.
