The Ph.D. Thesis submitted by Mr. Ahmed Mohammed Abdulqawi, Soil & water Department, entitled:   "Use of Surge-fertigation technique with different Irrigation Intervals to Optimize water, potassium and nitrogen use Efficiencies ".   Under supervision of: 1. Prof. Hussein Mohamed Ali Ragheb 2. Prof. Hala Hasanein Gomah 3. Prof. Saleh Mahmoud Ismail   Approved BY:   1. Prof. Mohy El Din Mohamed Shelbaya 2. Prof. Shawky Mohamed Metwally 3. Prof. Saleh Mahmoud Ismail 4. Prof. Hala Hasanein Gomah   Would be discussed at Monday 24/1/2017 on 10.00 o’clock in the Hall attached to the  International Conference hall