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Register a new userSpatial Variability of Nitrate and Phosphate Concentrations in Waters from Main Drainage Canals at Al-Hassa Oasis, KSA
التغير المكاني لتركيز كل من النترات و الفوسفات في ماء قنوات الصرف الرئيسة بواحة الأحساء في المملكة العربية السعودية
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يتوقف النشاط الزراعي في واحة الأحساء بالمملكة العربية السعودية على عملية الري المقرونة بعملية صرف تتم من خلال شبكة متميزة التصميم تنضمن ثلاثة مصارف رئيسة، يغطي اثنان منها (D2 و D١) معظم الأجزاء المزروعة من الواحة التي تبلغ مساحتها إجمالا ٢٠ ألف هكتار فيما يغطي الثالث (D٣) منطقة محدودة. هدف هذا البحث إلى إختبار التغيرات المكانية في تراكيز عنصري النترات و الفوسفات في ماء الصرف من المصرفين D1 و ٢ D.
The Al-Hassa oasis at the Kingdom of Saudi Arabia is an agricultural area depends on irrigation associated with a drainage network with three main drainage canals. Two of them, the D١ and the D٢, cover most of the oasis total area (٢٠،٠٠٠ ha) while the third one (the D٣) covers a limited area. This study aimed to examine the spatial variability in the concentrations of NO٣ - and PO٤٣- in the drainage water of the D١ and the D٢ canals.
References used
Adriano, D.C. and H.E. Doner. ١٩٨٢. Bromine, chlorine, and fluorine. In: Methods of Soil Analysis, Part ٢: Chemical and Mineralogical Properties (٢nd Edition) (Eds. A. L. Page, R. H. Miller and D. R. Keeney), Soil Science Society of America. Madison, WI., USA.
Al-Mudaihysh, A.S. ١٩٩٧. The chemicals in agriculture and food: Between Necessity and risk, II “Agricultural fertilizers”. In: The Proceedings of the First Saudi Symposium for Agricultural Sciences (Eds. A. M. T. Aldarbi, M. O. Ghandourah, A. S. Alhazmi, I. S. Almuhaiza and H. M. Abou- Tarboush), A Symposium Organized during March ٢٥-٢٧ ١٩٩٧ by the College of Agriculture, King Saud University, Riyadh, KSA
(Al-Taher, A.A.S. ١٩٩٩. Al-Hassa: A geographical study. Al-Hussainy Press, Al- Hassa, Kingdom of Saudi Arabia (In Arabic
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language and social studies textbooks of primary and middle stages
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age and social studies.
The present study aimed to evaluate the productinty status of panicum
turgidum (Thumam) under the environmental conditions of the eastern
province of Kingdom of Saudi Arabia. Forty eight experimental sites (each of
25 m2, i.e. 1*25 m) were randoml
y selected from three locations (Roads of
Riyadh, Ogair and Damam), which represent the micro-environment of
thumam. Obtained results showed that the dominated plant species associated
with thumam were Eragrostis barrelieri, Haloxylon salicornicum, Leptadenia
pyrotechnica, Plantago ovata and Zygophyllum coccineum. The forage
production of thumam was 57 kg dry matter/ha. However, the nutrient value of
it was relatively low due to the low protein content (4.2 %) and high crude fiber
(30.2 %). Moreover, neutral detergent fiber was 62.4 %, acid detergent fiber
was 65.4 % and lignin was 11.70 % which indicate low nutritional forage value,
compared with traditional forage crops, i.e. Rhodesgrass (Chloris gayana) and
Alfalfa ( Medicago sativa). Macronutrient contents (Na, K, Ca and Mg) were in
the range of sheep and camel requirements, while P was very low as well as
micronutrients (Zn, Cu and Mn).
البروتين
Protein
المادة الجافة
Dry Matter
المملكة العربية السعودية
المنطقة الشرقية
الثمام
Eastern province
Soil drought and salinity
جفاف التربة و ملوحتها
إنتاجية علف الثمام
محتوى الثمام من العناصر الكبرى و الصغرى
نوعية علف الثمام
Thumam
Panicum turgidum
Sandi Arab Kingdom
Thumam forage production
Macro and micro nutrients confent
Thumam forage quality
المزيد..
The changes in coefficient of distribution of lead and cupper has been studied in
system with two phases, liquid water contaminated with lead and copper-solid (natural
Phosphate of Syria) correlation of the following factors: Time of mixing phases,
size of the
developed steel ,change the values of PH ,concentration of elemental lead and
concentration of element capper ,the concentration of calcium as a competitor to the
occupation of sites available on the solid phase, the ratio V\m presents the water phase size
on the mass of phase ,the Percentage removal of lead from aqueous samples prepared in
the laboratory91,57-99,95% were the best conditions for a vast proportion removed can be
summarized as follows:
PH=[6,63-10,11], Time of mixing phases =60 minutes and V/m=1000.
The Percentage removal of copper from aqueous samples prepared in the
laboratory 95,27 -99,96 % were the best conditions for a vast proportion removed can be
summarized as follows:
PH= [7,89-11,01] , Time of mixing phases =60 minutes and V/m=1000.
Ideal conditions have been applied that were obtained according to laboratory tests
on water samples from industrial input to Banias refinery and water samples from
industrial drainage to Syrian company for oil transport after Removal for lead was(
100%,99 %). Removal for copper was( 100%,98 %) .
The paradox of the search reveals the growing need of phosphate
derivatives, and to develop its usage in Agriculture and other consumer
goods. However, the manufacturing of the raw phosphate products is still
under the requested demand which requi
res importing to reimburse the
shortage in spite of the fact that the raw materials are exported in a very
low additional cost.
The search aims to identifying the geographic distribution of Phosphate
in Syria and the possibility of investing it, identifying its characteristics
and its economic value, coefficient of correlation between production and
consumption, and observing the future horizons of a rational investment
in it.
Phosphoric acid is one of the most important products in
chemical industry, where it is used in different industries,
such as food and fertilizer industries and so on .
This study focuses on the preparation of phosphoric acid
from Syrian phosphate in the laboratory by using the
hemihydrate method , and determines the best optimal
conditions for preparing this acid using this method .
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