@article { author = {Abuzaid, Ahmed}, title = {Assessing degradation of floodplain soils in north east Nile Delta, Egypt}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {135-146}, year = {2018}, 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.2017.1717.1130}, abstract = {Evaluating degradation of fertile soils is the key factor to attain sustainable crop production. An assessment of human-induced soil degradation as well as degradation risk was executed in an area in the north part of Nile Delta. Eight soil profiles were dug and samples were collected. The soils are affected by slight salinity and sodicity hazards. Slight to moderate compaction and moderate waterlogging hazards were noted. The GIS spatial model showed that 47.8% of the soils are affected by slight degradation hazards, while the remaining 52.2% are affected by strong (26.1%) and moderate (26.1%) hazards. Excessive irrigation, the lake of conservation measures, improper use of heavy machinery and inadequate drainage are main anthropogenic cause factors for soil degradation. The rate of soil degradation during the last four decades was none to slight since little changes in EC, ESP, bulk density and water table depth were shown. The area is affected by low chemical degradation risks, while the physical risks are very high. Achieving sustainable land use in the area requires proper management practices.}, keywords = {soil degradation,Northeast Nile Delta,GIS,modeling}, url = {https://ejss.journals.ekb.eg/article_5020.html}, eprint = {https://ejss.journals.ekb.eg/article_5020_7f47f769fe4c6826731960d4b8598b8f.pdf} } @article { author = {Edress, Nader and Nabeh, Maysa}, title = {A geologic matching of the soil categories and their geo-chronological rock units covering the Sinai Peninsula using GIS, Sinai, Egypt}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {147-159}, year = {2018}, 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.2018.2279.1146}, abstract = {Soils of Sinai show development of soil group from ancient Precambrian dominated parent rocks in the south to younger Quaternary coastal deposits in the north. Five groups and eight soil classes are distinguished in the study area, according to world reference base for soil resources. They are leptosols (35%), calcisols (34%), arenosols (17%), regosols (10%), and solonchaks (4%) soil group cover Sinai Peninsula. Leptosols soil classes are characterized by the presence of stiff hard rock units of dominating Precambrian basements for lithic leptosols soil class or Mesozoic and Tertiary rocks for eutric leptosols soil class. Cretaceous, Tertiary and Quaternary strata represent the main essential parent rocks for yermic calsiols class of about 98.93%, while the haplic calsisols class comprises mainly of Paleozoic composed of 73.44%. Both classes are characterized by the same component of rich carbonate formations. Arenosols are composed of sand dunes with relic of high elongated folds that emerge from it. The calcaric arenosols soil class may represent the end course of transportation agent came from the hinterland area from the south. Due to the effect of water seepage from the Mediterranean sea, sabkhas were formed to separate the gelyic solonchaks class from the former arenosols one. Unconsolidated material of regosols soil groups are composed of unconsolidated clastic deposits of eutric regosols class and calcaric regosols class.}, keywords = {Leptosols,Calcisols,Regosols,Arenosols,Solonchaks,Sinai,Egypt}, url = {https://ejss.journals.ekb.eg/article_5188.html}, eprint = {https://ejss.journals.ekb.eg/article_5188_1b5208fc8d7d5283c5cc8d8650b7df21.pdf} } @article { author = {Ebrahim, Amr Sadik and Ali, Ali}, title = {Yield Response of Squash "Cucurbita Pepo" to Water Deficit under East Owainat Conditions}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {161-175}, year = {2018}, 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.2018.2738.1152}, abstract = {This experiment was carried out during two summer successive seasons of 2016 and 2017, at a private farm in East Owainat area, New valley Governorate, Egypt, to study the effect of soil cover techniques by plastic sheet for cultivation lines: uncovered (UCS), half covered (HCS), full covered (FCS) at different applied irrigation water levels (IR=100, 90, 80, 70, 60, 50 and 40% calculated based on crop evapotranspiration) under surface (SDI) and sub- surface drip (SSDI) irrigation systems on marketable yield, crop quality parameters, actual evapotranspiration (ETa), water use efficacy (WUE), irrigation water use efficiency (IWUE) and yield response factor (Ky) for summer squash fruits "Cucurbita pepo L.". The results showed that, the marketable yield and studied quality parameters except total soluble solid (TSS) and acidity pH of summer squash fruits gave the highest values under FCS, IR=100% and SSDI treatment for both seasons. While, seasonal ETa gave the lowest values 100.48 and 98.95 mm for both seasons respectively, under UCS, IR= 40% and SDI treatment. Meanwhile, the maximum values of summer squash fruits WUE and IWUE were (25.27 and 16.38 kg m-3); (25.59 and 16.52 kg m-3) for both seasons respectively, under FCS, IR= 60% and SSDI treatment. Finally, the lowest values of Ky for summer squash fruits were 0.03 and 0.05 for both seasons respectively, under FCS, IR= 90% and SSDI treatment. This study concluded that the cultivation of summer squash under FCS, IR= 60% and SSDI treatment. could be saved about 42 and 44% of applied irrigation water and increased marketable yield of the summer squash fruit about 16 and 15% for both seasons respectively, compared to that under control treatment (UCS, IR= 100% and SDI).}, keywords = {Cover soil, Squash,actual evapotranspiration,water use efficiency,Irrigation water use efficiency,yield response factor}, url = {https://ejss.journals.ekb.eg/article_5469.html}, eprint = {https://ejss.journals.ekb.eg/article_5469_dd2a3a2180ec343be41469adece4a657.pdf} } @article { author = {Amer, Megahed and Hashem, Ibrahim}, title = {Impact of Some Soil Amendments on Properties and Productivity of Salt Affected Soils at Kafr El-Sheikh Governorate}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {177-191}, year = {2018}, 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.2018.2356.1148}, abstract = {Two field trials were conducted in salt affected soils at special farm Mares El-Gamal village, Kafr El-Sheikh Governorate, Egypt to study the effect of gypsum, compost, ammonia injection and subsoiling on some physio-chemical soil properties and yield of barley (winter 2016/2017) and rice (summer 2017). Seven treatments were tested using a randomized complete block design with three replicates The results showed that improvement of soil chemical properties such as soil salinity and soidicity by application of soil gypsum requirements (SGR100%) combined with 4ton from compostFed.-1 and subsoiling in both seasons. Also the same previous treatments had a highly positive effect on soil Ca/Mg ratio in root zone (0-60 cm) in both seasons (1.24 and 1.47, respectively) as compared with check treatment (0.76 and 0.78). It could be observed that the application of 100% from SGR combined with compost and subsoiling was superior to other treatments in decreasing of the soil bulk density and increment both of the soil porosity and Soil infiltration rate. Yield of barely and rice were highly significantly increased and recorded highest values due to application of gypsum combined with ammonia and subsoiling. Economic efficiency was recorded highest values due to application of SGR and ammonia injection with subsoiling in both seasons.Consequently, application of SGR with ammonia and subsoiling treatment could be used economically to improve the yield of barely and rice. And application of SGR combined with compost and subsoiling to improve some physio-chemical properties of salt affected soil at Kafr El-Sheikh Governorate.}, keywords = {barely,rice,Soil salinity,Soil amendments}, url = {https://ejss.journals.ekb.eg/article_5472.html}, eprint = {https://ejss.journals.ekb.eg/article_5472_ba2cb1fa2dfc6e1abb7e791008d8b289.pdf} } @article { author = {Abd-Elrahman, Shaimaa and Taha, Noura}, title = {Comparison between Organic and Mineral Sources of Potassium and Their Effects on Potassium Fractions in Clay Soil and Productivity of Potato Plants under Water Stress Conditions}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {193-206}, year = {2018}, 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.2018.2752.1153}, abstract = {Potassium (K) is an essential element for plant growth that maintains water balance within its cells. Different forms of K were investigated for their effects on potato (Solanum tuberosum, cv. Spunta) plants grown under water stress conditions as a kind of adaptation to the climatic changes and water shortage under Egyptian soil conditions. Also, knowledge of different K fractions in the studied clay soil is important to achieve the sustainability in agriculture. Therefore, a field experiment was conducted during the two tested seasons of years 2014 and 2015 at the Faculty of Agriculture, Ain Shams University, Qalubia governorate, Egypt. Two sources of K were tested under three levels of irrigation water in a split-plot design. Results indicated that K fractions in soil were in order of total K > non-exchangeable/ fixed > exchangeable > water soluble. The 50% irrigation level of irrigation requirements (IR) combined with K-humate as ground application increased water soluble and exchangeable K in the studied soil. While there was hardly no changes observed due to the applied treatments on fixed and total amounts of K in the soil. Regarding the studied vegetative growth and yield parameters of the growing potato plants, the treatment 100% of IR combined with K-humate as soil application caused significant increases. The specific gravity of tuber, as an important indicator of potato tuber quality, recorded the highest value by applying 50% of IR combined with K-humate as ground addition, compared to mineral addition which came in the second order. Regarding the nutrient concentrations in potato haulm, results revealed that the 50% of IR combined with K-humate gave the highest content of N, while the same irrigation level with K-humate plus foliar spray gave the highest content of P and K, during the two tested seasons. In tubers, 50% of IR combined with K-humate as soil application gave the highest concentration of N and P during the two tested seasons, while 75% of IR in the first season and 50% of IR in the second season combined with K-humate plus foliar spray gave the highest values of K content. The calculated water use efficiency (WUE) showed that the highest value was obtained by 50% irrigation level of IR combined with soil application of K-humate.}, keywords = {potassium humate,potassium sulphate,Ground application,foliar application,Potassium fractions in clay soil,Productivity of potato plants,irrigation water levels}, url = {https://ejss.journals.ekb.eg/article_5724.html}, eprint = {https://ejss.journals.ekb.eg/article_5724_3639150ec408bd2292db574053de03c2.pdf} } @article { author = {Khalifa, Ramy and Saied, Mahmoud and Khalifa, Mohamed}, title = {Improvement and Evaluation of Slide Irrigation Design in the Northern Delta Clay Soils}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {209-220}, year = {2018}, 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.2018.2632.1154}, abstract = {A field study was conducted in clay soil at Sakha farm, Kafr EL-Sheikh governorate in 2013/2014 and 2014/2015 growing seasons. The objective of this work is to evaluate the effect of level border irrigation system using (100m length and 7m width and 0.1% slope) under different irrigation water discharge (2.5, 3.5 and 4 L sec-1 m-1) and cut-off irrigation (100, 90 and 85% of border length) on the infiltration characteristics, intake family and some irrigation parameters under post irrigation of wheat crop. The most important results include that, the irrigation at 4L/sec./m greatly affected the basic infiltration rate and cumulative infiltrated depth. Intake rates were decreased under water discharge and cut-off irrigation conditions in both seasons. The irrigation discharge at 4L/sec./m combined with cut-off at 85% of border length, the designed inflow time, deep percolation and run-off values were decreased, while water application efficiency was increased. The design ratio of inflow time to advance time is more than 2, meanwhile, the application time increased over the advance time, in this case the design is acceptable in clay soil. The measured irrigation stream was more than the design one, this caused increasing the amount of water applied. The design advance, recession and opportunity intake time were more than the measured one. It can be concluded that the design of border irrigation under different irrigation discharge and cut-off irrigation is reasonably efficient and values of different parameters fall within all the design limitations.}, keywords = {Border design,clay soil,Cut-off,irrigation system,irrigation discharge,wheat crop}, url = {https://ejss.journals.ekb.eg/article_6429.html}, eprint = {https://ejss.journals.ekb.eg/article_6429_7a1918689819abcfd8553b4b246d39fc.pdf} } @article { author = {Ali, Alshaymaa and Mahgoubb, Samir and Bahnasawy, Nabil and Tahoun, Salah}, title = {Soil Properties and Their Effect on Some Biological Activities in Abu Suberia Valley- Aswan, Egypt.}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {221-232}, year = {2018}, 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.2018.1972.1138}, abstract = {The present study includes combined soil and biological aspects of Abu Suberia valley. Twelve representative soil surface samples, down to 20 Cm.were collected and subjected to detailed soil analyses. The obtained results reveal that, soil texture ranges from sand to heavy clay , CaCO3 content is widely variable (0.08-7.21 %) and OM content is extremely low ( 0.02- 2.47 %). pH is neutral to mildly alkaline. The soil samples are non-saline to saline, mostly non-saline. The cationic composition is mostly dominated by Na+ or Ca++ while the anionic composition is mostly dominated by Cl-. Cation exchange capacity ranges widely from (2.43-38.08 me/100 g soil) with the higher capacity due to clay mineral type and content. Exchangeable cations are dominated with Ca++. Available P ranges from (0.82-4.77 me/Kg soil). The mineralogy of clay fraction is dominated by kaolinite as identified by XRD. Data of biological investigation showed that the total counts of bacteria, fungi, yeast, actinomycetes, thermophilic bacteria, cellulolytic bacteria, nitrifying and denitrifying bacteria range from 22.4x106 to 284x106, 10x103 to 27.x103, 6x102 to 20x102, 9x103 to 19x103, 31x103 to 48x103, 0.90x104 to 1.82x104, 38.0x104 to 121.0x104 and 30.0x102 to 65.0x102 CFU/g dry soil, respectively. The biological activities of the concerned enzymes were also recorded and interpreted. Statistical evaluation reveals that soil OM, pH, ECe, Ca++, Na+, Cl-, SO4-- and exchangeable Na are correlated well with total counts of most bacteria, fungi and actinomycetes. Also, OM is correlated with dehydrogenase, alkaline phosphatase and urease.}, keywords = {Abu Suberia valley,soil properties,Clay Mineralogy,Fungi yeast& actinomycetes bacteria,Enzymes,Statistical correlation}, url = {https://ejss.journals.ekb.eg/article_5640.html}, eprint = {https://ejss.journals.ekb.eg/article_5640_49c68455efa72a4df1f8164d66187cbd.pdf} } @article { author = {}, title = {Efficiency of Elemental Sulfur and Phosphorus Fertilizer in Enhancing Soybean (Glycine max L.) Growth and Yield in a Clayey Soil}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {233-244}, year = {2018}, 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.2018.11587}, abstract = {A field experiment was conducted during the summer season of 2013 in the farm of Faculty of Agriculture, Benha University, Egypt. Sixteen treatments with three replicates were performed and resulted from the combination of four rates of the elemental sulfur (S0=zero, S1=119, S2=238 and S3=357 kg S ha-1) and four rates of P (P0=0, P1=238, P2=476 and P3=714 kg superphosphate ha-1). Application of S at all used P rates increased branch and pod numbers, nutrients concentrations, and protein and oil contents of soybean. The highest values of the above-mentioned parameters were found at addition of 357 kg S ha-1 in the presence of 714 kg superphosphate ha-1, which were statistically similar to those at 238 kg S ha-1 with 476 kg superphosphate ha-1. Straw and seed yields of soybean showed the same performance under 238 kg S ha-1 and 357 kg S ha-1 in the presence of all applied doses of superphosphate. So, application of 238 kg S ha-1 and 476 kg superphosphate ha-1 could be highly recommended to increase the yield of soybean. Soil properties also markedly affected by addition of the elemental S. Soil pH decreased from 7.53 at S0P0 (control) to 7.12 at S3P3 treatment. Available P showed another pattern, its highest values were 44.22 and 45.65 mg kg-1 as results of S2P3 and S3P3 additions and without significant differences between them. The current study confirmed the positive role of the elemental S in improving both soil fertility and soybean production in the chosen clayey soil under field conditions.}, keywords = {Soybean,soil properties,yield,Elemental S,P fertilization}, url = {https://ejss.journals.ekb.eg/article_11587.html}, eprint = {https://ejss.journals.ekb.eg/article_11587_20b0386c34492b302a61b5b32d16328b.pdf} } @article { author = {}, title = {Diffusion Rate and Activity Index of Some Slow Release Nitrogen Fertilizer}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {245-253}, year = {2018}, 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.2018.13193}, abstract = {}, keywords = {}, url = {https://ejss.journals.ekb.eg/article_13193.html}, eprint = {https://ejss.journals.ekb.eg/article_13193_2bbedbeaeeb18a677be0a97017fde51d.pdf} } @article { author = {}, title = {The Effective Role of Vermicompost, Elemental Sulphur and Ascorbic Acid on Tomato Plants Grown on A Newly Reclaimed Calcareous Soil at Fayoum Depression}, journal = {Egyptian Journal of Soil Science}, volume = {58}, number = {2}, pages = {254-273}, year = {2018}, 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.2018.11808}, abstract = {Agricultural utilization of desert marginal soils at El Fayoum Governorate edges is of importance to support the local farmer incomes, particularly under the best and suitable management practices of land and available water resources. A newly reclaimed soil encompassing by Eocene limestone at the eastern edge of Tamia district was a matter of concern in this work. It is a sandy clay loam in texture, moderately saline, non-sodic, and calcareous in nature with a subsurface diagnostic horizon of calcigypsic one, and classified as Typic Calcigypsids, fine loamy, mixed, heperthermic, moderately deep. According to a parametric system, it could be evaluated as moderately suitable (S2ws1s2s3n), with soil limitations of wetness, soil depth, salinity/alkalinity and CaCO3 content, with an intensity degree for each, lies in the range of slight to moderate (rating = 90-80). The soils of this area are generally suffering from a very low productivity, may be due to their high contents of CaCO3, low organic matter as well as a relatively high soil pH and soluble salts that might be reflected on nutrients availability and soil physical and chemical properties. Therefore, a field experiment was conducted on a newly reclaimed soil at the area of study during the two successive cultivation seasons of 2010-2011 and 2011-2012 using tomato plants (Lycopersicon esculentum, c.v. 1077 hybrid) as test crop. Plots were distributed in a randomized complete blocks with three replicates and irrigated with the only available source in the area (mixture of the Nile water and drainage water at a ratio of 1:1) .Treatments applied were planned in an attempted to improve soil properties with a minimat risk of chemical pollution as follow : vermicompost (cattle manure added to earthworms) as an organic manure was applied to the soil plots at four rates (0, 10, 15 and 20 m3 fed-1) and elemental sulphur (i.e., agrochemical soil amendment) at four rates (i.e., 0, 50, 150 and 250 kg S fed-1), while the rates of ascorbic acid were 0, 150 and 300 mgL-1, in form of few drops of Tween-20 added to the spraying solution as a surfactant. Data showed considerable responses for either vermicompost, elemental sulphur or ascorbic acid especially at their highest rates (20 m3 vermicompost/feddan + 250 kg sulphur /feddan + 300 mg L-1 ascorbic acid/feddan) together were their positive response on the vegetative growth and flowering parameters of tomato plants, i.e., plant height, number of leaves/plant, thickness of stem/plant at soil surface, number of branches/plant, leaf area, number of inflorescences/plant, number of flowers/inflorescence, dry weight/plant, and chlorophyll a & b contents. Data also, showed great increases in essential nutrients uptake by tomato plants such as N, P, K, Fe, Mn and Zn due a role of vermicompost in improving: a) Soil hydro-physical and chemical properties, b) Released organic constituents of active groups such as fulvic and humic acids which have the ability to retain the essential plant nutrients in available chelate forms) and c) Soil biological conditions that enhancing mineralization of the released organic nutrients in available forms. On the other hand, it could be deduced that application of S as a soil amendment at a rate of 250 kg/fed is important to sustain soil productivity and to obtain economically best crop yield attributes under such a calcareous soil for avoiding direct restrictive effect of CaCO3 on the nutrients released and their mobility towards plant roots.  }, keywords = {Calcareous soil,Limitations of soil productivity,ascorbic acid,Elemental sulfur,Vermicompost andTomato plants}, url = {https://ejss.journals.ekb.eg/article_11808.html}, eprint = {https://ejss.journals.ekb.eg/article_11808_1f0d28bc6e3e72e04125071d58e23924.pdf} }