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Register a new userStudy of some physical and moisture properties of cinnamon soil in the province of Daraa
دراسة بعض الخصائص الفيزيائية و الرطوبية للتربة القرفية في محافظة درعا
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نفذت هذه الدراسة عام 2011 في موقع بحوث التربة بمحافظة درعا بهدف دراسة بعض الخصائص الفيزيائية و الرطوبية للتربة القرفية التي تقدر مساحتها بنحو 48 ألف كم 2 أي ما يعادل 26 % من مساحة القطر العربي السوري و هي تمثل منطقة زراعة المحاصيل الحقلية و أن دراسة خصائص الترب القرفية تعد أساساً لحسن إدارتها. بينت النتائج أن التربة المدروسة ذات قوام طيني و تتميز بقدرتها العالية على الاحتفاظ بالماء، حيث راوحت السعة الحقلية بين 30 % و 38.85 %، و تحتوي على قيمة عالية من الماء المتاح و الماء القابل للإفادة الضرورين لنمو النبات، فقد بلغت قيمة الماء المتاح كسماكة طبقة مائية في الطبقة السطحية 38,93 مم، أما الماء سهل الإفادة بلغت اتاحته 25,69 مم، و كانت أعلى قيمة للرطوبة الهيجروسكوبية و لنقطة الذبول في العمق الأخير لقطاع التربة المدروس. كما تميزت التربة المدروسة بارتفاع نسبة المسامية الكلية التي راوحت بين 51,78 % و 55,59 %. أما المسامية الهوائية فكانت جيدة حيث راوحت قيمتها بين 9,38 % و 15,47 % في مختلف الأعماق مع انخفاضها في العمق 30- 45 سم إلى %5,15.
The study was carried out at Soil Research Center in the province of Daraa during 2011 in order to study some physical and moisture characteristics for cinnamon soil, which occupies (48000 km²), equivalent to 26% of the area of the Syrian Arab Republic and represents the cultivation of growing field crops with a rainfall ranges between 150- 300 mm. The results showed that the mechanical analysis for soil referred that its texture is clay with a good ability to retain water, the field capacity rated between (30-38.85)%. The studied soil has high value of available water (38.93mm) and useful water (25.69mm) in the surface layer. The highest value of permanent wilting point and hygroscopic moisture was reached in the final depth in studied profile soil, It was also distinguished a high total porosity ranged between 51.78 and 55.59% with a good air porosity amounted to 9.38 - 15.47 % in different depths and with the decline to 5.51 % in the depth 30 - 45cm.
References used
Abu Nukta, F. 1982. Soil of Horan Basin (Syria). I. General and Classification, Univ. of Damascus. Syria: 16- 23
Black, G. R. and K.H. Hartge. 1986. Bulk density, In method of soil analysis. Part 1, Physical and mineralogical method 2nd ed.Edited by A. Klute. P. 363- 375
Champan, H. D. and P. F. Partt. 1961. Methods of analysis for soils, plants and water. Uni California, Berkeley, ca
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Abu-Jarash orchards area in Damascus to identify the effect of improved
organic materials as sludge, manure and compost in improving some soil
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t productivity. Results showed that the three
types of organic material affected the physical characteristics of the studied
soil. They decreased its bulk density, increased its total porosity and increased
its ability of holding water at field capacity. Results also showed that the
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three organic materials, particularly the sludge increased the total productivity
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foamed concrete is a concrete made by cement slurry mixed with foaming agent, so
that foamed concrete is lighter than conventional concrete. The objectives of this study is
to produce this kind of concrete, and to study some of its physical and mec
hanical
properties. Mix design of concrete was made for four required densities (1000,
1300,1600,1900 kg/m3), cement content of 350 kg/ m3, and water to cement ratio equal to
0.5. Different tests were performed to determine some properties of product concrete such
as density, compressive strength and splitting tensile strength. The results demonstrated the
possibility of production foamed concrete with wide range of density and strength. The
oven dry density of foamed concrete was in the range of (870-1773 kg/m3) , compressive
strength was in the range of (2.95-16.2 Mpa ), and the splitting strength was in the range
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باتت طريقة الري بالتنقيط من اهم طرائق الري الحديث المستخدمة على اغلب المحاصيل المزروعة في محافظة درعا والتي تسود فيها التربة القرفية .
The study has shown that the apparent bulk density of soil increases with the increase
of compression and moisture during press. The maximum rate of increase in depth was 0 –
20 cm that amounted 0.38g/cm3 at compression by 257.44-kilopascal and moi
sture
average at compression by 19.03% (equal to 60% of the field capacity average of the soil)
in comparison with the non-existence of compression. In addition, the size of the pores
bigger than 50 microns decreased at the same above compression and above moisture in
depth of zero – 20 cm by 20.20%. The size of pores bigger than 10 microns decreased by
20.65% in comparison with the non-existence of compression. While it was noted that the
the maximum loss of root yield that amounted 17.52%, at compression by 257.44
kilopascal, and moisture 19.03%.
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simple and multiple correlation coefficients and relation equations, from which
we can predicted th
e soil aggregate stability modules of rapture and soil bulk
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selection of the larger marshes at every transect. The transects are: First
toward Amara included marshes of Al-Msendak, Al-Saadiah and Al-Wadiah.
Second toward Al- Nasiriah which included the marshes of Delmag, Ghumugaa
and Al-hammar. Third toward Samawa which included the marshes of Al-
Ramah and Lafti.
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