50
(Ec = 0.6 dS/m) and full irrigation of poor quality water (Ec = 6.3 dS/m) using
CropSyst model and they found that yield losses were 5 and 6% under fresh and
poor quality water, respectively. Ouda et al. (2010a) simulated the effect of reducing
the applied irrigation water to wheat grown in clay soil under surface irrigation
using Yield-Stress model (Ouda 2006). Their findings reported 3% yield losses
under 20% saving in the applied irrigation water. Similarly, Ouda et al. (2007) simulated the effect of skipping the last irrigation applied for wheat in clay soil under
surface irrigation. They indicated that water saving was 13% and yield losses was
2%. Ouda et al. (2008a) reported that simulation of the application of deficit irrigation, namely 20% reduction in full irrigation to wheat resulted in only 3% reduction
in its yield. Furthermore, simulation of the effect of 30% in full irrigation to wheat
resulted in 5% reduction in wheat yield.
3.8.1.2 Egyptian Clover
Khalil and Abouelenein (2012) reported that application of 70% of full irrigation to
Egyptian clover grown in clay soil under surface irrigation resulted in 17% yield
losses. Whereas, Abouelenein et al. (2010) showed that application of 70% of full
irrigation to Egyptian clover resulted in 11% yield losses under surface irrigation in
clay soil. Furthermore, simulation of the application of deficit irrigation to Egyptian
clover grown in clay soil under surface system using Yield-Stress model (Ouda
2006), where 90% of full irrigation was applied resulted in 5% yield losses (Ouda
et al. 2010b).
3.8.1.3 Sugar Beet
El-Darder et al. (2017) indicated that saving 23% of the applied water to sugar beet
grown in sandy soil under sprinkler system resulted in 8% yield losses. Whereas,
sugar beet yield losses were 7% and water saving was 22%, when sugar beet was
irrigated with drip system. In sandy loam soil of Behira governorate of Egypt,
Mehanna et al. (2017) studied the effect of application of deficit irrigation on sugar
beet yield and they found that 33% saving in the applied irrigation water reduced
yield by 18%. Eid and Ibrahim (2010) tested the effect of saving 17% of the applied
irrigation water to sugar beet grown under surface irrigation in salt affected soil,
where irrigation was done using fresh water and they found that percentage of yield
reduction was 14%.
3.8.1.4 Other Winter Crops
– Faba bean: Sallam et al. (2014) indicated that application of deficit irrigation
to faba bean grown in salt affected soil under surface irrigation, where 17% of
the applied water was saved resulted in 12% yield losses. Ouda et al. (2010c)
A. E.-H. Zohry and S. Ouda
(Ec = 0.6 dS/m) and full irrigation of poor quality water (Ec = 6.3 dS/m) using
CropSyst model and they found that yield losses were 5 and 6% under fresh and
poor quality water, respectively. Ouda et al. (2010a) simulated the effect of reducing
the applied irrigation water to wheat grown in clay soil under surface irrigation
using Yield-Stress model (Ouda 2006). Their findings reported 3% yield losses
under 20% saving in the applied irrigation water. Similarly, Ouda et al. (2007) simulated the effect of skipping the last irrigation applied for wheat in clay soil under
surface irrigation. They indicated that water saving was 13% and yield losses was
2%. Ouda et al. (2008a) reported that simulation of the application of deficit irrigation, namely 20% reduction in full irrigation to wheat resulted in only 3% reduction
in its yield. Furthermore, simulation of the effect of 30% in full irrigation to wheat
resulted in 5% reduction in wheat yield.
3.8.1.2 Egyptian Clover
Khalil and Abouelenein (2012) reported that application of 70% of full irrigation to
Egyptian clover grown in clay soil under surface irrigation resulted in 17% yield
losses. Whereas, Abouelenein et al. (2010) showed that application of 70% of full
irrigation to Egyptian clover resulted in 11% yield losses under surface irrigation in
clay soil. Furthermore, simulation of the application of deficit irrigation to Egyptian
clover grown in clay soil under surface system using Yield-Stress model (Ouda
2006), where 90% of full irrigation was applied resulted in 5% yield losses (Ouda
et al. 2010b).
3.8.1.3 Sugar Beet
El-Darder et al. (2017) indicated that saving 23% of the applied water to sugar beet
grown in sandy soil under sprinkler system resulted in 8% yield losses. Whereas,
sugar beet yield losses were 7% and water saving was 22%, when sugar beet was
irrigated with drip system. In sandy loam soil of Behira governorate of Egypt,
Mehanna et al. (2017) studied the effect of application of deficit irrigation on sugar
beet yield and they found that 33% saving in the applied irrigation water reduced
yield by 18%. Eid and Ibrahim (2010) tested the effect of saving 17% of the applied
irrigation water to sugar beet grown under surface irrigation in salt affected soil,
where irrigation was done using fresh water and they found that percentage of yield
reduction was 14%.
3.8.1.4 Other Winter Crops
– Faba bean: Sallam et al. (2014) indicated that application of deficit irrigation
to faba bean grown in salt affected soil under surface irrigation, where 17% of
the applied water was saved resulted in 12% yield losses. Ouda et al. (2010c)
A. E.-H. Zohry and S. Ouda