53
to sesame grown in clay soil under surface irrigation resulted in 26% saving in
the applied irrigation water, compared to application of seven irrigations with
only 6% yield losses (Tantawy et al. 2007).
3.8.3 Deficit Irrigation to Intercropping Systems
The effect of deficit irrigation under intercropping systems were studied for sunflower intercropped with peanut system under sprinkler system (El-Mehy et  al.
2018) and under drip system (Ouda et al. 2018). Water saving was 16 and 15%, for
sprinkler and drip systems, respectively. Yield losses for both sunflower and peanut
were 4 and 3% under sprinkler and drip systems, respectively. Furthermore, saving
14% of the applied water to sunflower intercropped with soybean system under
surface irrigation in clay soil resulted in 5% yield losses for both crops (Darwesh
et al. 2016). Ouda et al. (2007) indicated that saving 6% of the applied irrigation
water to soybean intercropped with maize, with 1:2 soybean to maize pattern cultivated in clay soil under surface irrigation resulted in losses by 13 and 5% for soybean and maize, respectively. Whereas, yield losses in sole planting of soybean and
maize were 7 and 11% under the same percentage of saved water.
3.9 Conclusion
Egypt is blessed by suitable weather allows the cultivation of variety of crops. The
Nile River is also a bless, where it is the main source of water for irrigation and
consequently food production. Lots of valuable studies were conducted in Egypt to
study the effect of water management on the final yield of crops. Other studies were
done to test the effect of application of deficit irrigation on the yield of the crops and
the amount of saved water. These studies revealed that there is high potential to save
irrigation water with low yield losses. These studies also implied that water productivity could be increased under deficit irrigation. The saved irrigation water will
permit the cultivation of new areas and increase food production.
References
Abd El-Halim AA (2015) Water saving under fixed-furrow surface irrigation in clay soil of the
middle Nile delta of Egypt. WIT Trans Ecol Environ 200(Water and Society III):343–352.
https://doi.org/10.2495/WS150291
Abd El-Zaher SR, Gendy EK (2014) Effect of plant density and mineral and bio-nitrogen fertilization on intercropping faba bean with sugar beet. Egypt J Appl Sci 29(7):352–366
Abd El-Zaher SR, Shams AS, Mergheny MM (2013) Effect of intercropping pattern and nitrogen
fertilization on intercropping wheat with tomato. Egypt J Appl Sci 28(9):474–489
3 Egypt Faces Water Deficiency, and Food Insufficiency
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