هدف تنفيذ هذا البحث اختيرت سلسلة طبوغرافية و حضرت مقاطع ترابية، أخذت عينات تربة من
المقاطع بشكل منهجي، و جرى تحليلها مخبرياً. بينت نتائج التحاليل المنفذة أن العامل الطبوغرافي أدى
دوراً مهماً في تحديد بعض خصائص التربة و صفاتها مثل عمق مقطع التربة، و التركيب الحبيبي للأفاق
السطحية، فضلاً عن توزع كربونات الكالسيوم. فقد تبين أن محتوى التربة من العناصر الصغرى يراوح
بين المتوسط و القليل، بسبب فقر المادة الأم بهذه العناصر، و استنزاف بعضها الآخر من قبل النبات، نتيجة
للاستثمار الطويل لهذه الترب دون العمل على تحسين خواصها الخصوبية. و قد لوحظ تغير في تراكيز هذه
العناصر كلما اتجهنا نحو الجنوب، إذْ تتأثر هذه العناصر بعملية الغسل و علاقتها بالموقع الطبوغرافي بين
ضهر المنحدر و قدم المنحدر و أخفسه، و ربما يؤدي (pH) التربة دوراً جزئياً في ذلك.
In order to implement this research soil profiles selected on a toposequence
were systematically collected from different geohorizons. Results indicated that
topographical factors played important roles in determining some soil features
such as the depth, texture distribution of CaCO3 and the fertility matter. The
study showed that the soil content of minor element was ranged between
moderate to low, and this may be related to the mineralogical composition of
the parent rock and weathering status and to the use of these elements by the
plants uptake during the long lasting exploitation. The results also indicated
that the decrease of these elements was consistent with the decrease of
elevation, such as heading from the slop to the plain. This probably also due to
the relation between the leaching process and topographical position and to a
less extend to the pH of the soil.
References used
Abu Nukta, F. 1995. Environmental impact of fertilizers use in Syria. Proc. Seminar, production & use of chemical fertilizers and environment. Cairo. Eds. M. M. El-Fouly and F.E. Abdalla, pp35-50
Abu Nukta, F. and R. Parkinson. 2007. Effect of Humic Substances on Micronutrients Availability in Soils. Damascus University Journal for Agricultural Sciences. 23(2): 163-178
ACSAD, 1980. Tour Guide, Soil Classification Workshop. 2-4 April. ACSAD\ SS\R28 Damascus.170 P
This study was achieved to identify some characteristics of clay minerals of
soils in the southern of region (provinces of Daraa, Sweida). Several soils
profiles were selected, forming a toposequence, including the western slope of
Jabal Al Arab a
Yarmouk basin is considered one of the important basin in Syria due to its
economical contribution in the total national production of the country.
Also water plays a vital role in this effective activity of the economical
development, the purpose
During the last decades a large area of irrigated lands in Syria has been
shifted from extensive cropping to intensive agriculture. Many kinds of soils
became incapable to supply high yield crops by their micronutrients
requirements. Therefore, th
انصب اهتمام العلماء مؤخرا على دراسة العوامل والشروط الكفيلة بزيادة عائدات الارض من المحاصيل الزراعية
The study was conducted at Tishreen University, where laboratory experiments were carried out in the laboratories of the Faculty of Agriculture - Department of Soil and Water Sciences, while artificial rain experiments were conducted in the Tishreen 16 Dam lake area.