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أثـــــــــر إضـــــــــــــــــافة الجبــــــــــــــــــــس والأحمــــــــــاض الهيوميــــــــــة في إدارة التــــــــرب المرويــــــــــــة بميـــــــــــــاه مالحــة

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 Publication date 2018
and research's language is العربية
 Created by د. يوسف الخلف




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References used
- درمش، محمد خلدون. 1976. تأثير المحاليل الملحية بالخصائص الفيزيائية، وتطور معادن الميكا للأراضي السورية. أطروحة دكتور مهندس. جامعة بولساباتيبيه – فرنسا.
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An experiment was carried out under the conditions of the green house at the Faculty of Agriculture, University of Aleppo, in order to determine the effect of both gypsum and humic acid on the total porosity and pH of irrigated soils by saline water and wheat yield. The experiment was designed in a split-spilt dissection method, with the main sections comprising three levels of irrigation water salinity (W1:0, W2:3, W3:6 g-1 NaCl). Three levels of gypsum were mixed with soil: (G1:0, G2:25, G3:50 g). Three levels of humic acid were added with irrigation water (H3:48, H2:24, H1:0 kg/h). The coefficient Leaching with irrigation water for W3 and W2 was applied at %10 and %20 of the field capacity, respectively. The results confirmed the effective role of gypsum in mitigating the effect of sodcity in Structure soil damage, and this was reflected by the increase in total porosity values in G3. The results indicated a decrease in pH values within the W3 level of irrigation saline water compared with W2. The results showed the significant role of the gypsum in pH reduction as opposed to that of humic acid. The role of humic acid, especially the H3 level, was evident in increasing the yield and weight of 1000 grains for the wheat, while the G2 level of gypsum was superior in yield. The results showed that the W1 yield was better than W2 and W3.
The pot experiments were carried out under the conditions of the glass house at the Faculty of Agriculture, University of Aleppo. The aim of the present study is to determine the role of gypsum and humic acid on some chemical properties of irrigated soil by saline water. The experiment was designed in a split second-order manner, with the main sections containing three levels of salinity irrigation water using sodium chloride salt as (W1:0, W2:3, W3:6 g𝓁-1). Three levels of gypsum were mixed: as (G1:0 , G2:25, G3:50 g). Three levels of acids were added with irrigation water as (H1:0,H2:24, H3:48 kg/he). The experiments for application leaching factor with irrigation water were carried out for treatment (W2,W3) at two levels as (%10 and %20) of field capacity, respectively. The results showed that the salt accumulation was higher when applied the leaching factor (W2), while the salt accumulation was decreased when the wash factor (W3) was applied. The addition of gypsum levels contributed for increasing in EC values, especially in the surface layer. The role of humic acid was effectively demonstrated in saline soils (W3, W2), where the concentration of sodium ions, SAR and ESP were significantly reduced when applying a high level of humic acid with irrigation water. The SAR values and the sodium-sodium ratio (ESP) were affected by the accumulation of salts in the surface layer.
A column experiment was carried out under the conditions of the laboratory of colloids and clay minerals at the Faculty of Agricultural Engineering at the University of Aleppo. The aim of study is know the effect caused by the magnetization of irriga tion water on the physicochemical properties of soils irrigated with water of different salinity. The experiment was carried out on selected gypsiferous soils from the village of Musharafa Al-Zakiya located in the Maskana project (Aleppo governorate). And it was irrigated with three types of water of different salinity (Euphrates River water -Rasm Al-Hamis village - Musharafa Al-Zakiya village). Irrigation technology was applied With magnetized water (M) and water without magnetization (NM), a leaching factor of 15% was used with water added to the columns, and the irrigation process was repeated ten times. The results indicated that the use of the water of Rasm Al-Hamis well and the well of Mishrifa, the magnetic purity, contributed to the washing of salts by 20% and 16% for the surface and subsurface layers, respectively, compared to similar treatments irrigated with normal water, and the results of the statistical analysis indicated that the decrease in the concentration of salts in the washed columns The magnetized water was significant. As for the magnetized water of the Euphrates, it contributed to the washing of salts from the surface layer within the soil columns by about 5.5%, compared with the treatment irrigated with non-magnetized Euphrates river water, and the decrease in the concentration of salts was not significant. The data indicated in general to the significant role of the washing coefficient applied in this study in the disposal of salts, in particular soda salts, as the data showed that the magnetization of water added to the studied soil columns contributed clearly in reducing the values of the adsorbed sodium ratio (SAR) and the ratio of exchangeable sodium (ESP) compared to the non-magnetized irrigation water. The magnetization of water also contributed to improving the porosity of soil irrigated with magnetized water, compared to treatments irrigated with ordinary water.
During the last decades a large area of irrigated lands in Syria has been shifted from extensive cropping to intensive agriculture. Many kinds of soils became incapable to supply high yield crops by their micronutrients requirements. Therefore, th e deficiency of Zn, B, Mn and Fe was mentioned in this soil. Humic substances influence micronutrients availability through chelating, which can either increase or decrease the availability of the micronutrients (MN). In this framework, two pot experiments were carried out in a greenhouse at the University of Plymouth (2006) to investigate the effect of a commercial humic substance (HS) on the micronutrients availability of: Fe, Mn ,Zn & Cu in two composite surface soil samples collected from Vertic Cambisols ,southwest of Syria & from Dystric Cambisols, southwest of England.
The effect of applying polyacrylamide polymer on soil crusting, seedling emergence, infiltration and runoff rates were studied on gypsiferous soils collected from the Euphrate Basin in Syria The boxes were exposed to the rainfall 45.48 mm/h using a rainfall simulator. Total runoff and infiltration measurements for all boxes were recorded. The boxes were then transferred to a temperature-controlled room (25±2 °C) for drying. Soil moisture content and crust strength were measured periodically until 90% water loss was recorded in the soil. Seedling emergence was also counted daily.

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