@article { author = {Yousif, Ibraheem}, title = {Soil Suitability Assessment Using MicroLEIS Model: A Case Study in Wadi El Heriga, North Western Coast Zone, Egypt.}, journal = {Egyptian Journal of Soil Science}, volume = {59}, number = {3}, pages = {209-221}, year = {2019}, publisher = {The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)}, issn = {0302-6701}, eissn = {2357-0369}, doi = {10.21608/ejss.2019.12598.1272}, abstract = {T he aim of this work was to investigate land capability and soil suitability of Wadi El Heriga, north western coast zone (NWCZ) of Egypt using the Microcomputer Land Elevation Information system (MicroLEIS).To achieve this objective,a digital elevation model (DEM) and Landsat 8 image were usedto extract the landform units of the investigated area. Eighteen soil profiles were dug to represent different landforms.Soil samples were collected and prepared for laboratory analysis. The correlation between landforms and soil data was carried out and then the soil map was compiled using Arc-GIS 10.3. Results showed that the investigated area include five landforms, i. e.,peneplain, foot slope, back slope, tablelandand undulating. The main sub great groups of the investigated soils are TypicHaplocalcids, TypicTorripasamments and TypicTorriorthents with the TypicTorripasammentswas the most common one. The investigated soils were categorized into three capability classes; (S2) good (50%), (S3) moderate (45.5%) and (N) marginal (4.5%).Rustles of soil suitability showed that about 20% of the studied area is suitable (S2) for fruit crops (olive, peach and citrus). About 25% of the area is suitable (S2) for watermelon, alfalfa, sugar beet, sunflower, cotton and soybean. Nearly, 49, 37 and 44% of the area is moderately suitable (S3) for wheat, maize and potato, respectively. The most limiting factors for crop cultivation are texture, soil depth, drainage and excess of CaCO3 content.}, keywords = {Suitability,MicroLEIS,Almagra Model,Wadi Heriga,Egypt}, url = {https://ejss.journals.ekb.eg/article_39787.html}, eprint = {https://ejss.journals.ekb.eg/article_39787_d1a74471a91c7dd5d7b817c4e84fbe9a.pdf} } @article { author = {Bahnasawy, Nabil and Elwa, Abdelsalam and Sedky, Laila and El- Essawi, Tomader}, title = {Distribution and Forms of Cobalt and Its Relationship to Mineralogical Composition in Soils of the 10th of Ramadan City,Egypt}, journal = {Egyptian Journal of Soil Science}, volume = {59}, number = {3}, pages = {223-239}, year = {2019}, publisher = {The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)}, issn = {0302-6701}, eissn = {2357-0369}, doi = {10.21608/ejss.2019.12895.1273}, abstract = {The current study aims at comprehending the distribution of the different forms of cobalt and its relationship to the mineralogical composition of soils of the 10th of Ramadan city. Eight representative soil profiles were selected from the study area. Results showed that soil texture ranged from sand to sandy loam. Soil pH ranged from 6.98 to 8.68. EC values ranged from 8 to 8. 12 dSm-1 at 25°C whereas the predominant cations followed the descending order: Ca2+>Mg2+>Na+>K+, while the anions followed the sequence: SO42- >Cl- >HCO3-. The predominant clay minerals were kaolinite, montmorillonite and illite, accompanied with accessory minerals in the descending order; quartz >gypsum >dolomite >calcite >aragonite >hematite >muscovite > potassium feldspar. The total cobalt (Co) content ranged from 1.42 to 6.51 mgkg-1 and the DTPA-extractable Co content ranged from 0.65 to 1.75 mgkg-1. The successive extraction (fractionation of Co) exhibited that the residual form was the most dominant one where its percentage ranged from 34.01 to 82.90 %. The soluble, exchangeable, carbonate bound, Fe-Mn bound and organic bound forms ranged from: 1.38 to 4.23 %, 5.26 to 45.58 %, 1.79 to 7.34 %, 2.63 to 7.75 %, and 2.29 to 9.52 %, respectively. Thus, it can be said that the following sequence characterized the distribution of Co forms among the different fractions: Residual >>exchangeable >organic-bound >Fe-Mn-bound > carbonate-bound >soluble. Accordinly, the obtained results evidently showed that there were relation between cobalt forms and mineralogical composition of soils.}, keywords = {Cobalt forms,Clay and accessory minerals}, url = {https://ejss.journals.ekb.eg/article_40314.html}, eprint = {https://ejss.journals.ekb.eg/article_40314_932ce93e992c32a0b8e7c675b1df2c91.pdf} } @article { author = {Mosaad, Ibrahim}, title = {Influence of Integrated In-soil Zinc Application and Organic Fertilization on Yield, Nitrogen Uptake and Nitrogen Use Efficiency of Rice}, journal = {Egyptian Journal of Soil Science}, volume = {59}, number = {3}, pages = {241-250}, year = {2019}, publisher = {The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)}, issn = {0302-6701}, eissn = {2357-0369}, doi = {10.21608/ejss.2019.13349.1277}, abstract = {Zinc deficiency is the most widespread challenge in rice cultivation, as well as the shortage of agricultural soil in organic matter, especially in Egypt. So it was experimentation of compost treatment (12 t ha-1) and in-soil zinc applications at three rates (0, 8 and 16 kg ZnSO4.7H2O ha-1), on growth, yield, total nitrogen uptake, agronomic nitrogen efficiency and nitrogen recovery efficiency of rice crop (Oryza sativa), variety Giza 178. Using organic fertilization as compost has recorded the highest values of plant height, dray weight, grain yield, straw yield, total nitrogen uptake, agronomic nitrogen efficiency and nitrogen recovery efficiency. In addition, in-soil zinc application rates are increasingly applied to the previous parameters. The increase in rice grain and straw yield by applying 12 t compost ha-1 was 13.4% and 7.14%, respectively, while applying 16 kg ZnSO4.7H2O ha-1 increased the rice grain yield by 12.31% and 17.55% increase in rice straw yield. Remarkable results have been registered when examining 16 kg Zn ha-1 with 12 t compost ha-1 on total nitrogen uptake and nitrogen recovery efficiency have been enhanced even under saline soil conditions.}, keywords = {rice,organic,mineral. zinc,nitrogen,uptake,Efficiency}, url = {https://ejss.journals.ekb.eg/article_40305.html}, eprint = {https://ejss.journals.ekb.eg/article_40305_52d3b065c54139780b4e8a49c6cdf35d.pdf} } @article { author = {Abd El-Halim, Abd El-Halim}, title = {Effect of Sugarcane Pulp Extract on Ameliorating Soil Structure Stability}, journal = {Egyptian Journal of Soil Science}, volume = {59}, number = {3}, pages = {251-258}, year = {2019}, publisher = {The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)}, issn = {0302-6701}, eissn = {2357-0369}, doi = {10.21608/ejss.2019.13672.1279}, abstract = {Application of organic materials is a common practice to increase soil aggregates and its stability, but the use of sugarcane pulp extract as a soil structural improvement, expressed in terms of mean weight diameter (MWD), has not been tested so far. Therefore, a laboratory experiment was conducted on intact soil core samples in a randomized complete design with two factors, i.e., two sources of extract (1) fresh sugarcane pulp (FSP) and (2) compost of sugarcane pulp (CSP), and seven drying and wetting cycles, plus the control (tap water only). Each soil core received an extracted volume of 175 cm3 (equivalent to the addition of 10 t FSP or CSP ha-1) on parts 25 cm3 for each cycle. The effectiveness of CSP extract was 3-folds as that of FSP extract in improving MWD. The most pronounced effect was at the 4th cycle, suggesting that 100 cm3 of CSP extract (equivalent to the addition of 6 t CSP ha-1) instead of 175 cm3 appears to be sufficient for improving the soil structural stability. Overall, the extract derived from CSP could be a faster way in improving soil structure than FSP which takes time to decompose and shows its benefits. However, more future investigations should be expanded to other types of soil and field trials to obtain further information to be used in advising land managers, especially those who use a drip-irrigation system.}, keywords = {compost extract,Mean weight diameter,Drying and wetting cycles,Soil aggregates}, url = {https://ejss.journals.ekb.eg/article_40306.html}, eprint = {https://ejss.journals.ekb.eg/article_40306_93a58ba59465cb54620cab73e85658b7.pdf} } @article { author = {El-Dissoky, Ramadan}, title = {Mixed and Conventional Nitrogen Fertilizers Impacts on Yield, Quality and Nutrient Uptake of Potato.}, journal = {Egyptian Journal of Soil Science}, volume = {59}, number = {3}, pages = {259-274}, year = {2019}, publisher = {The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)}, issn = {0302-6701}, eissn = {2357-0369}, doi = {10.21608/ejss.2019.13300.1275}, abstract = {Selecting the appropriate form of nitrogen fertilizer is one of the important limitation factors for potato yield and quality, which depends primarily on the availability and cost of fertilizers. The aim of this study was to compare the effect of conventional N-fertilizer forms (urea "U", ammonium nitrate "AN" and ammonium sulphate "AS') with mixed fertilizers (six MF: as a mixture percent's of AS with U or AN of the added N) on growth, yield, quality, nutrients uptake, N use efficiency (NUE) and profitability of potatoes grown in clayey loam soils. Two field experiments were carried out at Batra, Talkha, Dakahlia Governorate, Egypt (30° 16' 72"N; 31° 46' 25.80"E) during successive seasons; 2015/2016 and 2016/2017 on two potato varieties; Spunta and Diamant. Treatments were arranged in Complete Randomized Blocks Design with three replicates. The obtained results showed that mixed nitrogen fertilizers treatments enhanced plant growth, tuber yield, quality, nutrient uptake and NUE compared to sole application of conventional forms, with superiority of MF: 75%AN+25%AS, 50%AN+50%AS and 50%U+50%AS. The highest yield of dry matter and starch was obtained by adding MF of 50%AN+50%AS. However, the accumulation of NO3- in tuber is inversely proportional to dry matter; the highest content obtained with 100%Uea, but the lowest content obtained with MF of 25%AN+75%AS. The greatest percentage of NUE was obtained with MF of 50%AN+50%AS in both experiments. These results referred to the importance of AS application along with AN or U as a mixed fertilizer to maximize potato yield and quality, NUE and profitability.}, keywords = {Nitrogen Fertilizer forms,N use efficiency,potato varieties,Dry matter& nitrate relationship,profitability}, url = {https://ejss.journals.ekb.eg/article_40939.html}, eprint = {https://ejss.journals.ekb.eg/article_40939_88ca2eb72ed7575bfaceab58add01654.pdf} } @article { author = {Abd El-Halim, Abd El-Halim}, title = {Economic Assessment of Sugarcane Pulp as Amelioration of Soil Hydro-physical Characteristics, Water Productivity, and Wheat Yield}, journal = {Egyptian Journal of Soil Science}, volume = {59}, number = {3}, pages = {275-284}, year = {2019}, publisher = {The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)}, issn = {0302-6701}, eissn = {2357-0369}, doi = {10.21608/ejss.2019.15371.1293}, abstract = {Sugarcane pulp as organic material offers many advantages compared to other crop residues. Application of organic materials is targeted to improve soil hydro-physical characteristics, saved-water, and increase crop productivity. However, the use of sugarcane pulp to achieve these targets and its economical assessment has not been tested so far. Therefore, a field experiment was conducted in the two successive wheat-growing seasons 2015 and 2016 in a completely randomized design with four treatments and three replications. The sugarcane pulp treatments were 2, 4, and 6 t ha-1, plus to the control (0 t ha-1).The soil hydro-physical characteristics were determined, i.e., bulk density, total porosity, moisture content at both field capacity and wilting point, available water content, drainable pores, holding pores, capillary pores, saturated hydraulic conductivity, aggregate mean weight diameter and water-stable aggregates. Also, water requirements, saved-water (WS), water productivity (WP), and grain yield (GY), as well as, benefit-cost ratio (BCR) were calculated. Both treatments 6 and 4 t ha-1 improved soil hydro-physical characteristics, and increased GY, WS, and WP to highest values; and there were no significant differences between them for several characteristics. However, both treatments 2 and 4 t ha-1 achieved highest and comparable BCR (0.97 and 0.95, respectively), whereas the treatment 6 t ha-1 achieved lowest BCR (0.85).Therefore, economically, the use of2 t ha-1 is preferred and recommended.}, keywords = {Benefit-cost ratio,Water-saving,water productivity,Water requirement,Waste Recycling}, url = {https://ejss.journals.ekb.eg/article_45371.html}, eprint = {https://ejss.journals.ekb.eg/article_45371_208805bb8a63ac5a87bd1c43ea3c588b.pdf} } @article { author = {Yaseen, Rabaa and Yossif, Taher}, title = {Functional Microbial Diversity in Relation to Soil Characteristics and Land Uses of Wadi Um Ashtan Basin, North-western Coast, Egypt}, journal = {Egyptian Journal of Soil Science}, volume = {59}, number = {3}, pages = {285-297}, year = {2019}, publisher = {The National Information and Documentation Centre (NIDOC) affiliated to Academy of Scientific Research and Technology(ASRT)}, issn = {0302-6701}, eissn = {2357-0369}, doi = {10.21608/ejss.2019.14096.1282}, abstract = {The objective of this study was to survey the soil and assess the functional microbial diversity in relation to soil physicochemical characteristics and land uses of a representative watershed basin in the NW coastal region of Egypt. The area is classified, on basis of remote sensing as well as GIS facilities, into four (4) major landforms i.e. coastal plain, wadi course, piedmont plain, and plateau table land. Twenty soil profiles, representing those landforms, were morphologically described, their physical and chemical characteristics and land uses were determined; and their diagnostic characteristics were assessed. Results indicated that soils generally belong to the order Entisols and could be placed, at sub-group level, to Typic Torrifluvents, Typic Torriorthents, and Lithic Torrorthents. Also, Topsoil samples were collected from the mentioned twenty sites and evenly distributed over the entire watershed. They were analyzed for physical and chemical characteristics and the colony forming units (cfu) of nitrogen fixers, phosphate solublizers, and cellulose, protein and starch decomposers were estimated. Soil enzyme activities (dehydrogenase, nitrogenase, urease, protease, cellulose, amylase and phosphatase) were determined and Shannon and Simpson's diversity indices were used. The results based on statistical analysis showed significant correlation between “the studied soil characteristics and land uses” and “soil microbial groups and enzyme activities” of the study area. The findings of Shannon and Simpson indices of the studied microbial groups and enzyme activities indicated that the coastal plain soils have moderate functional diversity, soils of wadi course and piedmont plain have the largest functional diversity, and the lowest diversity indices were recorded in soils of the plateau table land. Correlation analysis showed that land uses was positively correlated with urease activity and negatively correlated with nitrogenase activity. In addition, microbial activities and population were negatively affected by gravel, calcium carbonate, hydrogen ion and salinity and positively affected by organic matter. The study outputs could support sustainable land management and participatory agricultural development process for rainfed agriculture in Egypt.}, keywords = {Wadi Um Ashtan,soil characteristics,land use,functional microbial diversity,enzyme activity,spatial analyses,GIS}, url = {https://ejss.journals.ekb.eg/article_45752.html}, eprint = {https://ejss.journals.ekb.eg/article_45752_644df57e4dd4f4e43e8421c2d646a5a3.pdf} }