The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)Egyptian Journal of Soil Science0302-670154320140930Characterization Changes of Heavy Metals Contents and Fractions in Sewage Sludge from Sirt Wastewater Treatment Plant, Libya19520811710.21608/ejss.2014.117ENJournal Article20131027MONITORING changes of the main chemical properties of<br />sewage sludge from Sirt Wastewater Treatment Plant, Libya was<br />investigated. Ten random sewage sludge samples were monthly<br />collected for a time span of one year. Average year values of TDS, pH,<br />organic matter and C/N recorded 1428.91 mg kg-1, 6.90, 76.3% and<br />7.97, respectively. Total N, P and K contents were in the normal range<br />(5.63, 1.41 and0.019%, respectively). The total concentrations of Fe,<br />Zn and Mn recorded high levels (2768, 1142 and 169 mg kg-1,<br />respectively). Low and more fluctuated total concentrations of Cu, Pb<br />and Ni were recorded (107, 45 and 35 mg kg-1, respectively). In<br />general, the total concentrations of heavy metals were found to be far<br />below the US-EPA ceiling limits except Cd and As which had<br />concentrations at or very close to their ceiling limits. The BCR<br />sequential extraction scheme was applied to investigate the<br />fractionation of heavy metals in the sludge. More than 50% of total As,<br />Pb, Fe, Mn and P were found in the fourth residual stable fraction<br />while the other heavy metals were mostly released in the first three<br />more mobile fractions (soluble-exchangeable, reduceable and<br />oxidizable) of the applied fractionation scheme. Special cautions<br />should be considered when using this sludge safely in agriculture<br />concerning the calculation of the loadings of heavy metals and their<br />mobility in soils.The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)Egyptian Journal of Soil Science0302-670154320140930Evaluation of some Agricultural Expansion Areas in the Eastern Desert of Egypt using GIS20922712010.21608/ejss.2014.120ENJournal Article20131117LAND evaluation for agricultural planning in Asyut, Sohaag and<br />…… Qena governors was carried out based on soil survey data using<br />remote sensing and geographical information system (GIS).<br />Evaluation of land suitability is one of the most effective methods for<br />proper agricultural land use planning, as it evaluates the suitability of<br />land for a specific crop. The aim of this study is to use GIS and<br />Automated Land Evaluation System (ALES) to assess land capability<br />and crop suitability for various soils and biophysical conditions. The<br />present study was undertaken to demonstrate the usefulness of GIS<br />technologies coupled with soil data to assess crop suitability to<br />achieve sustainable cropping systems in the studied area. As input,<br />the model requires soil data, and for an assessment of the study area, a<br />total of 40 representative soil profiles was used to collect soil samples.<br />The capability evaluation gives four capability orders for agricultural<br />and reclamation land capability (i.e., C1, good, C2, moderate, C3, weak<br />and N, marginal), Moreover, the evaluation model gives four limiting<br />factors suborders,which are topography (t), soils (l) erosion risks (r)<br />and bioclimatic deficiency (b).<br />The suitability of selected field crops indicated that wheat is<br />highly to moderately suitable in different developmental areas. On<br />the other hand, cotton is high to permanent not suitable for different<br />development areas. Suitability of maize is similar to the cotton crop.<br />Selected vegetable crops, potato range from moderately high to<br />permanent not suitable. Tomatoes are high to permanent not suitable.<br />Land suitability of selected fruits, citrus is mainly permanent not<br />suitable for cultivation in different development areas. On the other<br />hand, the date palm and olive trees range from high to permanent not<br />suitable.The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)Egyptian Journal of Soil Science0302-670154320140930Anti-microbial and Anti-oxidant Agents in Mushroom Fruit Bodies22923012110.21608/ejss.2014.121ENJournal Article20131204OTENTIAL drugs from mushrooms are useful for mankind. The<br />…. scientific basis for their traditional medicinal uses, the antimicrobial<br />activities of the crude polysaccharide extract from the<br />mushroom Pleurotus ostreatus were investigated. In this study,<br />ethanol and methanol were tested for extraction of mushroom fruit<br />bodies. Ethanolic and methanolic extracts of fungal fruit bodies<br />showed somewhat low antagonism towards Staphylococcus aureus<br />and Salmonella typhi. No anti-biosis due to either ethanolic or<br />methanolic extracts was detected against Enterobacter faecalis or<br />Lactobacillus bulgaricus. The fungal members Aspergillus flavus and<br />Candida albicans, as well, did successfully withstand the existence of<br />three extracts with no apparent inhibition. Total phenols and ascorbic<br />acid contents as antioxidant components in the mushrooms fruit<br />bodies were also detected.The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)Egyptian Journal of Soil Science0302-670154320140930A Time Course Study and Competition between Rhizobia-Affecting Nodulation in Two Soybean Genotypes23724712410.21608/ejss.2014.124ENJournal Article20131204greenhouse experiment was conducted to evaluate the time<br />course of nodulation and completion between strains USDA 123<br />and CB 1809 on Williams soybean and on P1 377578 (#671). This P1<br />has been shown to restrict nodulation and competition of USDA 123.<br />The study was performed using vermiculite and fine sandy loam soil<br />as growth media. Nodulation and competition in both medium were<br />evaluated at 4, 6, 8 and 10 weeks. Three additional treatments<br />included delayed inoculation of CB 1809 at 1, 2 and 4 weeks after<br />inoculation the soil with USDA 123 were also performed. Averaged<br />over the dates, strain USDA 123 produced 35 and 37%, respectively<br />of the nodule mass and number on P1 377578 as compared to<br />CB1809. In competition for nodulation in vermiculite, USDA 123<br />formed 43, 80, 62 and 64% of the nodules on Williams at 4, 6, 8 and<br />10 weeks, respectively, while only formed 0, 16, 9 and 16 % of the<br />nodule on P1 # 671. In soil, USDA 123 formed 95% or more of the<br />nodule on Williams through 10 weeks, while it formed 29% or less of<br />the nodules on P1 # 671. In the delayed inoculation treatments a<br />maximum of 14% of the nodules on Williams were formed by CB<br />1809, whereas on P1 # 671 a ratio of 89% or more were colonized by<br />the same strain. The marked influence of the host on competition and<br />affinity to nodulate with certain strain is demonstrated in this study.The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)Egyptian Journal of Soil Science0302-670154320140930Effect of NP Fertilizers on Growth and Biochemical Content of Sorghum Grown in Calcareous Soil24926413310.21608/ejss.2014.133ENJournal Article20131218EFFECTS of NP fertilizer levels on growth and biochemical content <br />of sorghum fodder grown in calcareous soil was investigated in <br />two successive seasons from 2010 to 2011. This study was carried out <br />at Maryout Research Station-Desert Research Center, between <br />longitude 29°47′ and 11°18′ E and latitudes 31°00′ and 15°18′ N. <br />Levels of NP Fertilizer applications were 0, 80, 100, 120 kg N/fed and <br />0, 20, 30 and 40 kg P2O5/fed. Nitrogen was given as three split <br />applications, whereas P was mixed with organic manure and supplied <br />as a single application. The control treatment was the existing nutrient <br />application of just of manure and potassium, given as a single <br />application. However, organic fertilizer was added to all treatments at <br />rate 10 m3 and also potassium at rate 50 Kg KO5/fed. The results <br />indicated that the application of the larger amounts of N and P had a <br />significant effect (P<0.01) plant higher, the number of leaves, stem <br />diameter, fodder and dry matter yields. In addition, this treatment <br />increased the mineral content of soil and plant with a reduced of <br />hydrocyanic acid (HCN) for fodder sorghum.The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)Egyptian Journal of Soil Science0302-670154320140930Influence of Water Deficit on Seed Yield and Seed Quality of Faba bean under Saline Soil Conditions at North Sinai, Egypt26527813410.21608/ejss.2014.134ENJournal Article20140112IMPACTS of climate change on crop yield losses and increasing in <br />water demand show that Egypt is vulnerable to climate change <br />because of it’s depending on the Nile River basically. The greatchallenge <br />of enhancing the agriculture is increasing the water use efficiency. A <br />field trial was designed in Complete Randomize Block Design and <br />carried out in Saline Soil at Sahl El-Tina (North Sinia) during the two <br />winter seasons 2011/2012 and 2012/ 2013, to study the response of <br />faba bean yield and seed quality to differential water regimes. The <br />experiment included three water irrigation schedules 3600, 6000 and <br />7200 m3/ha from El-Salam Canal and two varieties of faba bean <br />(Nobaria-1 and Sakha-3). The results indicate the decline in soil salinity <br />values with increasing the water supply regimes. Applying the water <br />regime 7200 m3/ha results in decreasing the soil salinity with 30% <br />compared to the water regime 3600 m3/ha in both seasons. <br />Nevertheless, the results show that weight of seeds/plant (g) and plant <br />height (cm) decreased with reducing of the water supply. Seed quality, <br />high protein, carbohydrate percent, radical length and seedling dry <br />weight were accompanying with low water application (3600 m3/ha). <br />Water use efficiency was convenient with lower water supplies. Using <br />the water regime of 6000 m3/ha with Sakha-3 under saline soil <br />conditions was more efficient according to the concept of water saving, <br />water use efficiency, seed quality and yield.The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)Egyptian Journal of Soil Science0302-670154320140930Soybean Response to Mn Added in EDTA- or CDTA-Buffered Nutrient Solution27928813510.21608/ejss.2014.135ENJournal Article20140112ADDITION of chelating agents can increase Mn2+ activity (pMn2+).
in soil solution and thus increase Mn uptake and plant growth. This
study aimed at evaluating soybean growth and Mn2+ uptake in
ethylenediaminetetraacetic acid (EDTA), or trans- 1,2-diamineciclohexane-
tetracetic acid (CDTA) buffered nutrient solution. Varied
levels (0.1, 0.32, 1.00, 3.16, 10.0 and 32.0 μM) of Mn, while constant
concentrations of all other micronutrients, in combination with EDTA, or
CDTA were imposed to soybean (Glycine max L.Merr.) in solutions with
pH 6.0.
Plant dry matter (DM) increased with increasing activity, not the total
concentration of Mn and was highest at pMn2+ 8.0-8.1 in EDTA- and
CDTA-buffered solutions. With pMn2+ >8.0, plant leaves accumulated
higher Mn2+, but 80-87 mg Mn2+ kg-1 DM seemed sufficient for optimum
plant growth. With pMn2+ < 8.0, the concentration remained at the
optimum level in the CDTA-buffered solution, whereas in the EDTAbuffered
solution leaf Mn2+ concentration was in the range 193-241 mg
Mn2+ kg-1 DM. At pMn2+ < 8.0, leaf Ca2+ and Mg2+ were higher with
MnCDTA than with MnEDTA. Leaf Fe3+ concentration remained
constant and did not significantly change in response to Mn availability.
Fe: Mn ratio decreased with increasing Mn availability in the EDTA and
CDTA solutions.
CDTA-buffered solution offers a strong control of plant uptake of
Mn2+ due to its strong control of the free concentrations of Mn2+, Ca2+
and Mg2+ under conditions of limited Mn availability.