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|b Egypt depends on the Nile River as a major source of water, as provide them with about 78.28% of its water needs, while the available from other sources does not exceed approximately 21.72% of these resources, and is considered the irrigation water is a strategic element in agriculture and the basis for agricultural expansion, and the agricultural sector is the most important economic sectors use of water resources, which consumes about 59.3 billion m3, accounting for about 85.1% of the total actual consumption of water per year. The most research problem generally in the low efficiency of crops in the use of irrigation water, so he targeted research estimating the productive efficiency of the use of irrigation water for the most important crops in the various governorates of the Republic, for the purpose of Alartfa standards of production efficiency of irrigation water use to better levels, and by expanding the cultivation of crops regions and provinces in the most appropriate, and the highest efficiency in the use of irrigation water, with reduced crop areas in the less efficient. Having adopted the search to achieve its objectives on the analysis of the data using Envelopment Analysis, DEA data (DEA) Data Envelopment Analysis is one of the methods of linear programming linear programming, which is used to measure the production efficiency of the use of irrigation water, using Palmtoffer and the availability of data from published and unpublished issued by the concerned authorities. The results of research showed with regard to the order of the governorates in terms of the efficiency of irrigation water use by the most important crops that planted in these governorates. Results showed that the wheat crop achieved the highest efficiency in Lower Egypt governorates which were ranked as follows: Menoufia, Gharbia, Behira, Dakahlia, Alexandria, Suez, Kafr Sheikh, Qaliubiya, Ismailia, Cairo, Sharkia, Domyat, where the degree of efficiency of irrigation water use reached: 91.7, 91.6, 91.5, 88, 87.2, 87, 86.9, 85.6, 84.4, 83.99 and 83.9 respectively. The order of the middle Egypt governorates were as follows: Minya, Giza, Beni Suef, Fayoum, where the degree of efficiency reached 84.6, 84.3, 80.4 and 78.4, respectively. The order of Upper Egypt governorates were as follows: Assiut, Aswan, Sohag, Luxor, Qena, where the degree of efficiency reached 68.6, 67.9, 65.4, 64.2 And 61.99 respectively. the results of data analysis showed that the Lower Egypt governorates planted with summer Maize achieved the highest efficiency regarding the irrigation water use compared to other regions of the republic. The order of the lower Egypt governorates were as follows: Menoufia, Suez, Qaliubiya, Dakahlia, Behira, Kafr Sheikh, Alexandria, Gharbia, Domyat, Cairo, Sharkia, Ismailia, where the degree of efficiency of irrigation water use reached: 86.5, 83.2, 78.6, 75.9, 75.1, 74.1, 74, 72.8, 70.2, 67.2 and 62.8 respectively. The order of the middle Egypt governorates were as follows: Giza, Minya, Beni Suef, Fayoum, where the degree of efficiency reached: 78.9, 70.4, 62.6 and 59.3 respectively. The order of Upper Egypt governorates were as follows: Sohag, Assiut, Aswan, Luxor, Qena, where the degree of efficiency reached: 64.8, 58.8, 49.3, 45.2 and 30 respectively. As well as the results of data analysis showed that the Lower Egypt governorates planted with summer Rice achieved the highest efficiency regarding the irrigation water use compared to other regions of the republic. The order of the lower Egypt governorates were as follows: Dakahlia, Behira, Kafr Sheikh, Gharbia, Domyat, Alexandria, Sharkia, Qaliubiya, Cairo, Ismailia, where the degree of efficiency of irrigation water use reached: 95.8, 89.1, 89, 82.9, 80.5, 79.7, 73, 69.8 and 68.7 respectively. And the middle Egypt governorates included Fayoum, Beni Suef only where the degree of efficiency were 81.7 and 69.7. Rice Cultivation does not spread in the governorates of Upper and middle Egypt. As explained in the analysis of data that the Middle and Upper Egypt governorates planted with sugar beet achieved the highest efficiency regarding the irrigation water use compared to other regions of the republic. The Lower Egypt governorates have been ranked as follows: Dakahlia, Gharbia, Qaliubiya, Sharkia, Menoufia, Domyat, Kafr Sheikh, Behira, Ismailia where the degree of efficiency of irrigation water use reached: 93.4, 86.1, 85.4, 84.3, 81.1, 78.5, 77, 70.4, and 69.4 respectively. The order of the Middle Egypt governorates were as follows: Minya, Beni Suef, Fayoum, Giza, where the degree of efficiency reached: 100, 79.2, 60.8, and 54.8 respectively. The order of Upper Egypt governorates were as follows: Assiut, Sohag, where the degree of efficiency reached: 89.3, and 89 respectively. The results of data analysis showed that the Lower Egypt governorates planted with summer sugar cane achieved the highest efficiency regarding the irrigation water use compared to other regions of the republic. The order of the Lower Egypt governorates were as follows: Gharbia, Kafr Sheikh, Alexandria, Dakahlia, Sharkia, Qaliubiya, Menoufia, Cairo, Suez, Behira, Domyat, where the degree of efficiency of irrigation water use reached: 100, 98.6, 95.8, 88.1, 81.3, 80.6, 69.4, 69.4, 68.6, 65.1, and 58.4 respectively. The order of the middle Egypt governorates were as follows: Minya, Giza, Beni Suef, Fayoum, where the degree of efficiency reached: 96.1, 77.9, 59.9, and 50.4 respectively. The order of Upper Egypt governorates were as follows: Qena, Luxor, Sohag, Aswan, Assiut, where the degree of efficiency reached: 86.6, 84.5, 84.1, 83, and 60.8 respectively The results of data analysis showed that the Lower Egypt governorates planted with cotton achieved the highest efficiency regarding the irrigation water use compared to other regions of the republic. The order of the lower Egypt governorates were as follows: Gharbia, Dakahlia, Qaliubiya, Menoufia, Sharkia, Behira, Domyat, Alexandria, Kafr Sheikh, Ismailia, where the degree of efficiency of irrigation water use reached: 100, 95.1, 88.6, 85.1, 83.1, 81.5, 78, 76, 75.1 and 67.8 respectively. The order of the middle Egypt governorates were as follows: Minya, Fayoum, Beni Suef, where the degree of efficiency reached: 62.8, 59.9 and 57.1 respectively. The order of Upper Egypt governorates were as follows: Assiut, Sohag, where the degree of efficiency reached: 77.8 and 69.9 respectively. As well as the results of data analysis showed that the Lower Egypt governorates planted with Flax Crop (Fiber) 0nly. The order of the lower Egypt governorates were as follows: Menoufia, Sharkia, Kafr Sheikh, Dakahlia, Qaliubiya, Behira, Domyat, and Gharbia, where the degree of efficiency reached: 100, 84.7, 83.5, 79.9, 76.9, 74.2, 70.3 and 63.7 respectively. Flax Crop (Fiber) Cultivation does not spread in the governorates of Upper and middle Egypt. The results of data analysis showed that some of Lower Egypt governorates planted with clover achieved the highest efficiency regarding the irrigation water use compared to other regions of the republic. The order of the lower Egypt governorates were as follows: Kafr Sheikh, Menoufia, Sharkia, Behira, Qaliubiya, Gharbia, Cairo, Alexandria, Suez, Ismailia, Dakahlia, Domyat, where the degree of efficiency of irrigation water use reached 100, 92.7, 80.4, 78.8, 70.1, 69.9, 60.4, 60, 59.9, 53.1, 51.6 and 46.5 respectively. The order of the middle Egypt governorates were as follows: Beni Suef, Giza, Minya, Fayoum, where the degree of efficiency reached: 78, 64.1, 57 and 38.8 respectively. The order of Upper Egypt governorates were as follows: Sohag, Qena, Luxor, Assiut, Aswan, where the degree of efficiency reached: 60, 52, 51.4, 51.3, and 45.1 respectively. The results of data analysis showed that some of Lower Egypt governorates planted with Clover Tahreesh Crop achieved the highest efficiency regarding the irrigation water use compared to other regions of the republic. The order of the lower Egypt governorates were as follows: Kafr Sheikh, Behira, Menoufia, Ismailia, Sharkia, Qaliubiya, Dakahlia, Gharbia, Domyat, where the degree of efficiency of irrigation water use reached: 100, 74.5, 72.3, 69.3, 64.8, 55.8, 51.6, 45.1 and 44.1 respectively. The order of the middle Egypt governorates were as follows: Minya, Beni Suef, Giza, and Fayoum, where the degree of efficiency reached: 88, 56 49, and 46, respectively. The order of Upper Egypt governorates were as follows: Sohag, Assiut, and Aswan, where the degree of efficiency reached: 73, 53, and 41, respectively.
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