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area to increase its total production and compensate the loss in the productivity
per hectare. Wheat production-consumption gap was calculated under this production alternative.
4. Implementing intercropping systems for wheat: the effect of five wheat intercropping systems on wheat total production was assessed. These intercropping
systems are: wheat intercropping with tomato, cotton relay intercropped with
wheat, wheat intercropping with sugar beet, wheat intercropped under fruit trees,
and wheat intercropped with sugarcane. Wheat production resulted from intercropping systems was added to the production resulted from applying deficit
irrigation on raised beds and its total production was calculated. Wheat
production- consumption gap was calculated under this production alternative.
5. Investment of the saved irrigation water: the saved irrigation water resulted
from cultivation on raised beds and application of deficit irrigation to Egyptian
clover and sugar beet in Chap. 5 and resulted from onion and tomato in Chap. 6
was assumed to be used in cultivating new areas with wheat, then the total production was calculated. Wheat production resulted from intercropping systems
was added to the production resulted from applying deficit irrigation and the
production resulted from the saved water from the four crops. The total wheat
production was calculated, as well as wheat production-consumption gap under
this production alternative.
Igbadun et al. (2006) stated that Water productivity is a quantitative term used to
define the relationship between crop produced and the amount of water involved in
crop production. It is a good indicator to compare between the five productions
alternatives, because it involves both crop production amount, and its applied irrigation water to produce this amount. Thus, water productivity was calculated under
the above five production alternatives.
6.2 Wheat Production and Deficit Irrigation
Wheat is an annual C3 crop and it is the most widely grown cereal crop. Since the
Green Revolution, wheat yields have increased in many regions of the world (Gewin
2010). To cope with the future demands for food, the yield of wheat and its yield
potential under water-limited conditions needs to increase because farmland is
increasingly being threatened by drought stress around the world (del Pozo et al. 2016).
6.2.1 Effect of Water Stress on Wheat
Under water-limited conditions, use of cultivars that have the ability to extract more
water from the deeper soil profile to increase yield is a key strategy for wheat management (Thapa et al. 2017). Under water stress, plants close their stomata to preA. E.-H. Zohry and S. Ouda
area to increase its total production and compensate the loss in the productivity
per hectare. Wheat production-consumption gap was calculated under this production alternative.
4. Implementing intercropping systems for wheat: the effect of five wheat intercropping systems on wheat total production was assessed. These intercropping
systems are: wheat intercropping with tomato, cotton relay intercropped with
wheat, wheat intercropping with sugar beet, wheat intercropped under fruit trees,
and wheat intercropped with sugarcane. Wheat production resulted from intercropping systems was added to the production resulted from applying deficit
irrigation on raised beds and its total production was calculated. Wheat
production- consumption gap was calculated under this production alternative.
5. Investment of the saved irrigation water: the saved irrigation water resulted
from cultivation on raised beds and application of deficit irrigation to Egyptian
clover and sugar beet in Chap. 5 and resulted from onion and tomato in Chap. 6
was assumed to be used in cultivating new areas with wheat, then the total production was calculated. Wheat production resulted from intercropping systems
was added to the production resulted from applying deficit irrigation and the
production resulted from the saved water from the four crops. The total wheat
production was calculated, as well as wheat production-consumption gap under
this production alternative.
Igbadun et al. (2006) stated that Water productivity is a quantitative term used to
define the relationship between crop produced and the amount of water involved in
crop production. It is a good indicator to compare between the five productions
alternatives, because it involves both crop production amount, and its applied irrigation water to produce this amount. Thus, water productivity was calculated under
the above five production alternatives.
6.2 Wheat Production and Deficit Irrigation
Wheat is an annual C3 crop and it is the most widely grown cereal crop. Since the
Green Revolution, wheat yields have increased in many regions of the world (Gewin
2010). To cope with the future demands for food, the yield of wheat and its yield
potential under water-limited conditions needs to increase because farmland is
increasingly being threatened by drought stress around the world (del Pozo et al. 2016).
6.2.1 Effect of Water Stress on Wheat
Under water-limited conditions, use of cultivars that have the ability to extract more
water from the deeper soil profile to increase yield is a key strategy for wheat management (Thapa et al. 2017). Under water stress, plants close their stomata to preA. E.-H. Zohry and S. Ouda