الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Water saving rice production systems are necessary to overcome water challenges in agriculture as we have severe water shortage in rice growing regions. So, a field experiment was conducted to investigate the effect of two rice cultivars (Giza 177 and Giza 178) and three cultivation methods drill seeding (DS), broadcast seeding (BS) and bed methods (B) on the studied parameters of rice yield components and irrigation water characteristics under surface irrigation method. The results cleared that cultivation methods under the two rice cultivars had significant effects on yield characteristics and water behavior. There were high significant differences among the two rice cultivars in number of tillers/𝑚2. Giza 178 has a marked superiority regards number of panicles/𝑚2 at harvest time with highest values. Interaction effect between cultivation methods and rice cultivars on grain yield was significant, where Giza 178 recorded the highest value of harvest index under drill seeding method. Giza 178 recorded the highest value of water productivity 0.98kg/m^3 with drill seeding method. While it recorded lower value of irrigation water productivity 0.64kg/m^3 when it is planted with bed cultivation method. Irrigation water input under Giza 177 with broadcast seeding was 4779.90𝑚3/fed, and for drill seeding and bed methods, the amount of irrigation water input was 3530.79𝑚3/fed and 2892.85𝑚3/fed respectively. Net return was higher with Giza 178 rice cultivar and regarding the benefit cost ratio, broadcast seeding method achieved the greatest value of benefit cost ratio under Giza 178 rice cultivar.