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CropSyst model to study its effect on barley yield in the year of 2039. The results
showed that barely yield will be reduced by 17 and 18% averaged over the six cultivars under A2 and B2 climate change scenarios, respectively. Moreover, changing
irrigation schedule to applying irrigation every 23 days improved barley yield by an
average of 2%. Giza2000 cv. was less affected by heat stress of climate change scenarios and had the least yield losses, and responded well to changing irrigation
schedules. Changing irrigation schedule to barley by applying water every 23 days
resulted in reduction of barley yield losses by an average of 2% for both scenarios
(Ouda et al. 2010).
In silty clay soil and under sprinkler system, four wheat cultivars, i.e. Sakha94,
Sakha93, Giza168 and Gemmiza9 were planted in three sowing dates: 9th of
November, 24th of November and 8th of December under four irrigation treatments,
i.e. irrigation with 0.6, 0.8, 1.0 and 1.2 ETc. The results indicated that Sakha93
planted in 24th of November under 1.2 ETc had the lowest yield losses, namely 39
and 34% under A2 and B2 climate change scenarios, respectively (Noreldin et al.
2012). In the above soil type and under drip system, four maize hybrids, i.e. SC10,
SC128, TWC310 and TWC323 were sown under three sowing dates: on the 2nd of
May, on the 13th of May and on 1st of June with 4 irrigation treatments, i.e. irrigation amount with 0.6, 0.8, 1.0 and 1.2 ETc in a field experiment. The effect of climate change was simulated using A2 and B2 climate change scenarios. The lowest
yield losses were found for hybrid SC128 planted on 2nd week of May using 1.2
ETc, namely 28 and 25% under A2 and B2 climate change scenarios, respectively
(Ouda et al. 2012a).
In salt affected soil and under surface irrigation, the effect of climate change on
two crops was studied: wheat and cotton. In both experiments, three irrigation treatments were studied, i.e. farmer irrigation practice (characterized by large applied
irrigation amount), required irrigation amount and irrigation amount applied for
raised bed cultivation. With respect to cotton, yield losses under farmer practice
were 28% under A2 climate change, and between 22% under B2 climate change
scenario. Cotton yield losses were lower under required irrigation amount by 25 and
21% and under the irrigation amount applied for raised bed cultivation by 22 and
18% under A2 and B2 climate change scenarios (Ouda et al. 2013). Wheat yield
losses under farmer irrigation practice were also high namely 47 and 44% under A2
and B2 climate change scenarios, respectively. Wheat yield losses were reduced by
5% when required irrigation amounts was applied, whereas the losses in wheat yield
were further reduced by 7 and 9% under A2 and B2 climate change scenarios,
respectively (Ouda et al. 2012b).
In sandy soil and under sprinkler irrigation, wheat was grown under two treatments: farmer traditional practice in applying chemicals through broadcasting fertilizers and use the sprayers to add herbicides to the plants, and chemigation, where
chemicals are applied via the sprinkler system. Wheat yield losses under farmer
practice were 32 and 27% under A2 and B2 climate change scenarios, respectively.
Whereas, wheat yield losses under chemigation were 26 and 20% under A2 and B2
climate change scenarios, respectively (Ouda et al. 2010). In another experiments,
the effect of using improved agricultural management practices on wheat yield was
S. Ouda and A. E.-H. Zohry
CropSyst model to study its effect on barley yield in the year of 2039. The results
showed that barely yield will be reduced by 17 and 18% averaged over the six cultivars under A2 and B2 climate change scenarios, respectively. Moreover, changing
irrigation schedule to applying irrigation every 23 days improved barley yield by an
average of 2%. Giza2000 cv. was less affected by heat stress of climate change scenarios and had the least yield losses, and responded well to changing irrigation
schedules. Changing irrigation schedule to barley by applying water every 23 days
resulted in reduction of barley yield losses by an average of 2% for both scenarios
(Ouda et al. 2010).
In silty clay soil and under sprinkler system, four wheat cultivars, i.e. Sakha94,
Sakha93, Giza168 and Gemmiza9 were planted in three sowing dates: 9th of
November, 24th of November and 8th of December under four irrigation treatments,
i.e. irrigation with 0.6, 0.8, 1.0 and 1.2 ETc. The results indicated that Sakha93
planted in 24th of November under 1.2 ETc had the lowest yield losses, namely 39
and 34% under A2 and B2 climate change scenarios, respectively (Noreldin et al.
2012). In the above soil type and under drip system, four maize hybrids, i.e. SC10,
SC128, TWC310 and TWC323 were sown under three sowing dates: on the 2nd of
May, on the 13th of May and on 1st of June with 4 irrigation treatments, i.e. irrigation amount with 0.6, 0.8, 1.0 and 1.2 ETc in a field experiment. The effect of climate change was simulated using A2 and B2 climate change scenarios. The lowest
yield losses were found for hybrid SC128 planted on 2nd week of May using 1.2
ETc, namely 28 and 25% under A2 and B2 climate change scenarios, respectively
(Ouda et al. 2012a).
In salt affected soil and under surface irrigation, the effect of climate change on
two crops was studied: wheat and cotton. In both experiments, three irrigation treatments were studied, i.e. farmer irrigation practice (characterized by large applied
irrigation amount), required irrigation amount and irrigation amount applied for
raised bed cultivation. With respect to cotton, yield losses under farmer practice
were 28% under A2 climate change, and between 22% under B2 climate change
scenario. Cotton yield losses were lower under required irrigation amount by 25 and
21% and under the irrigation amount applied for raised bed cultivation by 22 and
18% under A2 and B2 climate change scenarios (Ouda et al. 2013). Wheat yield
losses under farmer irrigation practice were also high namely 47 and 44% under A2
and B2 climate change scenarios, respectively. Wheat yield losses were reduced by
5% when required irrigation amounts was applied, whereas the losses in wheat yield
were further reduced by 7 and 9% under A2 and B2 climate change scenarios,
respectively (Ouda et al. 2012b).
In sandy soil and under sprinkler irrigation, wheat was grown under two treatments: farmer traditional practice in applying chemicals through broadcasting fertilizers and use the sprayers to add herbicides to the plants, and chemigation, where
chemicals are applied via the sprinkler system. Wheat yield losses under farmer
practice were 32 and 27% under A2 and B2 climate change scenarios, respectively.
Whereas, wheat yield losses under chemigation were 26 and 20% under A2 and B2
climate change scenarios, respectively (Ouda et al. 2010). In another experiments,
the effect of using improved agricultural management practices on wheat yield was
S. Ouda and A. E.-H. Zohry