الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
It was performed two experiments, First experiment Soil columns technique was conducted to assess the possibility of saline-sodic soils reclamation using gypsum “G”, sulfur “S” and rice straw compost “RSC” and direct current “DC”. Soil samples were collected from Sahl El-Hossinia, El-Sharkia Governorate, Egypt. The treatments were control (leaching alone), G, S, RSC, DC, DC + G, DC + S and DC + RSC. Results showed pronounced decreased in soil Bulk density, pH, ECe and exchangeable sodium percentage for all treatments. The most effective treatment was DC+G. The efficiency of treatments were in the following order: DC+G > DC+S> DC+RSC > DC > G > S > RSC > Control.
Second experiment, the goal of this experiment was assess the possibility of reclamation of salt affected soils using the computer model to predict the combinations amendments that have not been executed in reality. The investigated amendments in the experiment are gypsum “G”, sulfur “S” and rice straw compost “RSC” being designated as X1, X2 and X3, respectively. Three were actual thirteen treatments; after processing the data will show in 66 of combinations, which cover all the possible combination of X1, X2 and X3. Results showed pronounced decreased in soil bulk density (BD), pH, ECe and exchangeable sodium percentage for all individual treatments and their combination. The most effective individual treatment was G compared with sulfur and rice straw compost. The order where gypsum > sulfur > rice straw compost. The most effective combination in decrease ECe, soluble ions, and soil sodicity was consisting of 30: 40: 30% (of the 100% score) of gypsum, sulfur, and rice straw compost, respectively, meanwhile the most effective combination in decrease soil pH was consisting of 60: 40: 00% (of the 100% score) of gypsum, sulfur, and rice straw compost, respectively. The combination which gave the maximum value of exchangeable Ca2+ was consisting of 70: 30: 00% (of the 100% score) of gypsum, sulfur, and rice straw compost, respectively, while the minimum value of BD was obtained by combination consisting of 80: 20: 00% (of the 100% score) of gypsum, sulfur, and rice straw compost, respectively.