الفهرس 
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Abstract
This study seeks mainly to achieve the following objectives: The objectives of this research work are: (i) to determine the most suitable sowing date and interval using a value of ETc resulted from evaporation pan method for wheat; (ii) to optimize wheat crop production from irrigation water and soil units on North Nile Delta;(iii) to evaluate the productivity of wheat crop grown on north Nile Delta (iv) to assess the potential impact of climate change on wheat production under different irrigation treatments using simulation model and different climate change scenarios; (vi) to determine the best irrigation treatments that increase water productivity to be used as adaptation strategy under climate change. The study has reached a number of results, most important of which are: • No clear effect was observed of various sowing date on the behavior of water table regime • Irrigation intervals have a main effect on the regime of water table. The long irrigation interval, the deepest water table was resulted and visa versa. • The distance from both the irrigation canal in the north and main surface drain in the south of the experiment area. It could be concluded that irrigation at short intervals (5 irrigations),sowing date on 15th November and variety Masr 2 could produce higher number of tillers, spike length, plant height, 1000-grain weight , straw and grain yield in North Nile Delta-Egypt. Using simulation model can facilitate studying events not tested in the field. Thus, simulation models are the only tool to assess the effect of climate change on crops production. The results in this section revealed that CERESE-wheat model can represent the implemented field experiment because the goodness of fit test showed high agreement between measured and predicted values of wheat yield and water consumptive use. The climate change in 2030 and 2040, wheat season length will decrease, which will lead to lower dry matter accumulation. Also wheat yield will be reduced as a result of short season length and heat stress during the growing season. Furthermore, reduction in water consumptive use will occur as a result of decrease in above ground biomass and plant size due to heat stress. Thus, we recommend cultivation of wheat in the second week of1 November and the application of full irrigation to avoid high yield losses. Furthermore, adaptation strategies must be implemented to decrease vulnerability of wheat plants to climate change risks.