الفهرس 
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Abstract
These study aims to evaluate some of the scenarios used to simulate the effect of adaptation to improve the productivity of some crops planted under projected climate conditions strategies using the program (CropSyst) to clarify the change optimal agricultural operations that can be used to overcome the temperature is expected to increase as a result of projected climate changes was reached most suitable methods used in irrigation, quantity and planting dates that can overcome the climatic conditions contrary.
By using field experimental data under current and use climatic change scenarios. Field experiments were carried out at Kalubia and Giza Agriculture Research Station, during two successive seasons of 2004/05 and 2005/06. The collected data were used in studying the impact of climate change on grains yield, water requirements and water use efficiency.
After studying and comparative analysis, the result could be summarized as follows:
1. Wheat
The best adaptation strategy for wheat cultivar Giza168 under A2 and B2 climate change scenarios was sowing in the 1st week of November and applying second irrigation four weeks after sowing and then every 30 days interval.
For wheat cultivar Sakha93, the best adaptation strategy under A2 climatic change scenario in the 1st growing season was sowing in the 1st week of November and applying second irrigation four weeks after sowing and then every 30 days interval. However, in the 2nd growing season, sowing
II
was in the 3rd week of November and applying second irrigation four weeks after sowing and then every 30 days interval.
Under climatic change scenario B2, the best adaptation strategy was sowing in the 1st week of November and applying second irrigation four weeks after sowing and then every 30 days interval in both growing seasons.
Therefore, it is recommended to sow both wheat cultivars in the 1st week of November and applying second irrigation four weeks after sowing and then every 30 days interval.
2. Maize
It is recommended to plant both maize hybrids in the last week of April and applying the second irrigation in the 3rd week after sowing and then every 16 days interval under scenario A2 climate change scenario in both growing seasons. Under B2 scenario, it is recommended to sow maize in the 3rd week of May and applying the second irrigation in the 3rd week after sowing and then every 16 days interval in the 1st growing season while sowing maize in the last week of April and applying the second irrigation in the 3rd week after sowing and then every 16 days interval in the 2nd growing season.
Key Words: wheat (Sakha93 – Giza168) Kalubia, Maize (TWG310 – TWG324) Giza, Climate changes scenarios (A2 – B2)