الفهرس 
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Abstract
INTRODUCTION
Wheat is deemed the major exporter of food in the world and Egypt. Increasing wheat production out of growing productivity and the cultivated area is a substantial national base to diminish the gap between the Egyptian production and consumption. Whereas, the production of wheat in Egypt is 9000000 ton and the area harvested is 1.4 million ha in 2020. (FAO, 2020). Raising wheat yield unit area-1 can be realized by breeding high yielding cultivars and beneficent the cultural dealings of the crop. In recent years, water-efficient irrigation techniques (e.g., drip irrigation and sprinkler irrigation) that effectively conserve water have been substantially increased with government support (Wang et al, 2016 and Mehmood et al, 2019). In sandy soils and under different irrigation systems, there are positive relationships between the lack of waterstress, the vegetative growth, the economics of yield and water productivity of various Egyptian wheat varieties. These relationships are both linear or nonlinear in nature (Mansour et al, 2015) .