https://repository.sustech.edu/handle/123456789/23305 Sat, 11 Apr 2026 15:26:30 GMT 2026-04-11T15:26:30Z https://repository.sustech.edu/handle/123456789/23381 Anatomical, Physical, Mechanical and Technological Properties of Four Secondary, Lesser-Used Wood Species Growing in Blue Nile State, Sudan K. Abdelrahim, Dalia; H. Nasroun, Tageldin This investigation aimed at determining basic wood properties and quality attributes for four wood species growing in Blue Nile State as indicators for the different uses. The basic properties determined included some anatomical fiber characteristics, Most of these properties were determined from macerated fibers. Cell and cell components proportions, however, were measured from cross-sections, prepared by the microtome. These proportions and the fiber length were estimated using stereological techniques. . Physical properties - density, permeability, tangential shrinkage, radial shrinkage and moisture content, in addition to glue bond strength were determined according to standard procedures and so was compression parallel to the grain. Texture and surface quality, however, were determined according to an arbitrary visual grading method. Analysis of variance and Duncan’s Multiple Range test were carried out, looking for the levels of significance of the variations in all properties. Anatomical properties showed significant differences between the four species. . Physical properties also showed significant differences between the species studies. Talh had the highest density (0.82g/cm³) while Tartar had the lowest density (0.38g/cm³). Tangential and radial shrinkage were highest in gughan (10.19%), (5.41%) and lowest in Talh (6.02%), (3.06%) respectively. Liquid absorption (AB) ranged between Tartar (207.94%) and Talh (57.85%). Most of the absorption in tartar was along the grain and very little across the grain. Compression parallel to the grain showed a significant difference between talh, goghan 210,70MPa and kakamut (838.94, 840 and 838 MPa, respectively) on one side and tartar (210,70MPa) on the other; tartar being the weakest. Glue bond strength (BS) ranged between gughan (27.141Mpa) and Tartar (0.751Mpa), indicating that only gughan and kakamut gave adequate bond strength. With regards to texture gughan had the finest texture and grain uniformity, followed by kakamut and talh while tartar had a moderately course texture. Both kakamut and talh were also figured. Sat, 01 Jun 2019 00:00:00 GMT https://repository.sustech.edu/handle/123456789/23381 2019-06-01T00:00:00Z https://repository.sustech.edu/handle/123456789/23354 Evaluation the Current Range Condition in the Semi – arid areas at Eldebeibat area (South Kordofan State) – Sudan Omer Abdelrahim Ibrahim, Abdelrahim; Abas Fashir Kodeal, Galal The study was conducted at Eldebeibat area in South Kordofan State, which is considered the important part of Semi – arid grazing land in Sudan that used for grazing activity especially during the rainy season. The rangeland were divided into three sites according to soil types namely Clay, sandy and gardud soil. This study aims to evaluate the current Condition of rangelands in the semi – arid areas. For vegetation measurements the Parker loop method (Parker and Hirris, 1959) were used to measure relative plants composition and ground cover of the rangeland using transect 100 meter tape and a ¾ loop placed at ground level at one meter intervals. In addition to the quadrate method (Wilm et al, 1944) were used to determine plants frequency%. The questionnaires were designed for the two targeted group (mobile pastoralists and sedentary groups). The standard equations of vegetation measurements were used for plant attribute data analyzes, and the statistical Package for Social Sciences (SPSS) was used to analyze socio-economic data. The results show different plant attributes at the three sites, the sandy site recorded highest plant composition followed by clay soil while the lowest plant compositions was recorded at gardud soil in two grazing seasons. Clay site was dominated by Schoenfeldia gracilis, sandy site was dominated by Zornia glochidiata, while gardud site was dominated by Vossia cuspidata in the two seasons. Plant cover percentage at the three sites was low for the two rainy seasons; gardud site scored the highest percentage of bare soil for two seasons. The pastoralists confirmed that some species were found in all sites in the grazing areas such as Dactyloctenium aegyptium, Echinochloa colona and Ipomea spp, also sedentary people stated that some species were found around their villages such as Dactyloctenium aegyptium, Zornia glochidiata, Cenchrus spp, Sida cordofolia and Eragrostis spp. some species disappeared at the grazing areas, while some plant species appeared according to the investigation of two groups. The results also showed that the new species invaded the area, most of them were consider unpalatable for livestock grazing. The phenomenon of range land deterioration was very clear since the invader plants species were represented in three soil types Sat, 01 Jun 2019 00:00:00 GMT https://repository.sustech.edu/handle/123456789/23354 2019-06-01T00:00:00Z https://repository.sustech.edu/handle/123456789/23349 Effect of Seed Rate and Stage of Cutting on Growth, Yield and Quality of Forage Guar (Cyamopsis tetragonoloba. L) at Soba, Khartoum, Sudan Ibrahim Abdelsalam, Mohammed; M. H. Adar, H. The study was conducted at the experimental farm of the College of Forestry and Range Science, in Soba, Khartoum State which was located between longitude 32º 52ʹ98ʺ E and latitude 15º 60ʹ 40ʺ N. The study aimed at identifying the effect of seed rate and growth stages on growth, yield and nutritive value of guar forage. Treatments were three seed rates, S1, S2 and S3 (1.2, 2.4 and 3.6kg/ha) and three stages of cuttings, flowering, pod and maturity stages. Treatments were laid on a randomized complete block design (RCBD), with three replicates. Growth parameter measurements were taken every 15 days during the course of the experiment, while the production parameter readings were taken three times at the three stages, flowering, pod and maturity stage. The data were statistically analyzed using the SAS software program. The study found that stem diameter decreased with increased seed rate. There was a significant difference between the growth stage in terms of dry matter yield, where the seed stage recorded the highest dry matter compared to the flowering and pod stages. The study concluded that seed rate and growth stages had affected both growth parameters and dry matter yield of guar. Increased seed rate will result in high quality fodder and high forage production for livestock feeding. Sat, 01 Jun 2019 00:00:00 GMT https://repository.sustech.edu/handle/123456789/23349 2019-06-01T00:00:00Z https://repository.sustech.edu/handle/123456789/23348 Striga Resistance/Tolerance in Sorghum: an Outcome of Interactive Intrinsic and Extrinsic Factors M. A. A., Hamad,; A. G. T., Babiker,; Osman A. A., Mohamed An experiment was conducted in two consecutive seasons (2016/17 and 2017/18) at two sites, irrigated and rain-fed environments with the objective of transfer Striga resistance genes from the donor parents, IS9830, 555, SAR33, Framida, N13, ICSV006, ICSV007, PQ-34, Brhan and SRN39, and its derivatives P401, P402 and P405, to the improved elite Sudanese sorghum cultivars, Wad Ahmed, Tabat, Butana and Arfagadamek-8 as recurrent parents. The experiment, set in a randomized complete block design with four replicates, was laid in Striga hermonthica sick plots. The F1 plants were backcrossed (BC1F1) to the recurrent cultivars to obtain BC2F1 families, which were subsequently salved for two successive generations to generate BC2F3 progenies. Data analyses indicated highly significant differences (P≤0.01) for all traits among crosses and the respective checks. Spatiotemporal variations in Striga emergence, biomass, productivity and sorghum grain yield were observed. Several crosses (35.7% of the total) showed some degree of resistance to the parasite across the environments others (54.8%) showed resistance only under irrigation. The level of resistance varied from very low (12%) to high (89%) as raveled by reductions in S. hermonthica emergence. Correlation analysis revealed, consistently, highly significant negative relation between sorghum grain yield, Striga counts at 75 days after sowing and Striga biomass at harvest (r = -0.711 and -0.685, respectively P≤0.001) in the irrigated environments, but not in their rain-fed equivalents. The study indicates coexistence of two complementary mechanisms of defense, resistance and tolerance, against S, hermonthica, in the generated crosses and suggests a crucial role for both intrinsic and extrinsic factors in determining resistance and/or tolerance to the parasite. Sat, 01 Jun 2019 00:00:00 GMT https://repository.sustech.edu/handle/123456789/23348 2019-06-01T00:00:00Z