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تصويب بعض مسميات الدرجات العلمية بكالوريس الشرف كلية التربية
No full textتصويب بعض مسميات الدرجات العلمية بكالوريس الشرف كلية التربي
عرض نتيجة الطالبة تقوي ابراهيم صالح الامين علي مجلس الاساتذة
No full textعرض نتيجة الطالبة تقوي ابراهيم صالح الامين علي مجلس الاساتذ
نتائج الامتحانات النهائية للمستويين الرابع والخامس للعام 2013-2014 كلية الصحة
No full textنتائج الامتحانات النهائية للمستويين الرابع والخامس للعام 2013-2014 كلية الصح
مقترح برنامج ماجستير في التعليم الطبي للمهن الطبية مركز التطوير التربوي للمهن الصحية
No full textمقترح برنامج ماجستير في التعليم الطبي للمهن الطبية مركز التطوير التربوي للمهن الصحي
احصائية بنتائج الامتحانات التي عرضت علي مجلس الدراسات الاساسية والهندسية في اجتماع رقم 62-2014
No full textاحصائية بنتائج الامتحانات التي عرضت علي مجلس الدراسات الاساسية والهندسية في اجتماع رقم 62-201
Effects of Irrigation with Disposed Produced Petroleum Water on the Soil and Plants at Khartoum Refinery, Sudan
No full textThis study aimed to assess the effect of irrigation interval with disposed produced
petroleum water (DPPW) on the soil and vegetation cover at Khartoum Refinery
Company (KRC). Thirty-six soil samples (at depths of 0-30, 30-60 and 60-90 cm) were
taken from tree plantation blocks. The treatments were P0 (none irrigated, as a control)
and P1 and P2 were irrigated for four and eight years, respectively, and were analyzed for
pH, cation exchange capacity (CEC), total soluble Na+, Ca++, Mg++ and Cl-. Twenty-one
samples of tree leaves were collected from P0, P1 and P2 and analyzed for Na, Ca and
Mg. The results showed that at the soil surface (0-30 cm) no differences within and
between blocks in pH that was about 7.0 where the CEC of P0 and P2 have lower content
compared to P1. Application of the DPPW increased the soluble Na+ of P1 and P2
compared to P0 (2.2, 0.46 and 0.04 Meq/L respectively), and the same trend was shown
by soluble Ca++ (74.5, 18 and 2.5), and Mg++ (3.0, 2.5 and1.0). Cl- content increased as
irrigation interval increased (4.5, 104.5 and 30.0 Meq/L for P0, P1 and P2, respectively).
Systematic decrease of all soil chemical content with depths was shown for P0, P1 and
P2. For the plant, there was an increase in Na as irrigation interval increased (50.67,
516.67 and 723.33 for Po, P1 and P2 respectively), whereas Ca and Mg increased in P1
compared to P2 and P0. The risk of accumulation of soluble salts is expected to occur
with time, therefore, specific treatments to decrease the salts content of DPPW are
crucial
Some Aspects of Climate Changes and Impacts on Human Livelihoods
No full textThere is consensus among scientists and development professionals that the
climate is changing as a result of human induced activities associated with land use and
fossil fuel consumption. The human activities resulted in increasing emissions of carbon
dioxide (CO2) and other greenhouse gases (GHGs). Taking the year 1850 as a baseline
year, the emissions of CO2 gradually increased reaching a level of alarming concentration
particularly during the last seventeen decades than its state over 750 years before year
1850. Carbon dioxide concentration was stable within 180– 280 ppm over long periods
up to early 1900s, but its stability within these limits was disturbed leading to a
progressive increase up to 450 ppm at present. Increasing temperature and declining
annual rainfall amount are strongly associated with CO2 increase. The resulting impacts
are clearly observed in natural resources degradation which in turn affects human
livelihood and well being. The negative impact of the changing climate on human life is
reflected in scarcity of water resources, loss of agricultural land, decline in agricultural
productivity, decrease in forests and plant cover and losses in livestock resources.
Conflicts are becoming obvious results, causing human displacement and loss of lives.
The objective of the present paper is to review those issues of climate changes and their
impacts on human resources and livelihoods. Some examples of responses and measures
taken towards mitigation of these threatening aspects are highlighted. Conclusions and
recommendations are presented in order to be adopted by decision makers and land use
practitioners at national and State levels in Sudan
Wood Density Radial Variation of Balanites aegyptiaca (L.) Delile Grown in Sudan
No full textWood density is a variable influencing many of the technological and quality
properties of wood. Previous studies have shown that wood density is an important
indicator for wood end-use as it strongly affects the general quality of most of the wood
products. Understanding the radial variation pattern of wood density is important for its
end use. The present study was carried out to determine the pattern of wood density radial
variation of Balanites aegyptiaca tree species. Thirty healthy trees were chosen randomly
from 10 forests distributed in four states in Sudan, namely, Blue Nile, North Kordofan,
South Kordofan and White Nile. Two discs of 10 cm thickness were cut from each tree,
the first at 10% from the merchantable height and the second at 90%. One strip (includes
tree’s pith) was taken from each disc. The wood basic density was determined for five
radial portions representing the distance from pith to bark (10%, 30%, 50%, 70% and
90%). The density was measured based on dry weight and green volume. ANOVA was
used to test the variation among the five selected radial portions, using SPSS (version
18.0) program. The results revealed that Balanites aegyptiaca wood density follows the
increased pattern from pith to bark. The results showed also significant differences
among the five selected portions from pith to bark