99
million ton of winter tomato in the old and new lands, respectively and consumed
171.6 and 192.8 million cubic meters of irrigation water in the old and new lands,
respectively (Table 5.8).
Table 5.9 indicated that the total cultivated area of winter tomato was 70.4 thousand hectares, produced 3.119.1 million tons of winter tomato and consumed 364.4
million cubic meters of irrigation water. This amount of national onion production
is enough for local consumption (Central Agency for Public Mobilization and
Statistics 2018).
5.3.3.2 Cultivation on Raised Beds
Similar to the previous studied crops, we assumed that cultivation of winter tomato
on raised beds will increase its yield by 15% and save 20% of its water requirements
in the old lands only. The saved irrigation water could be used to cultivate more
lands and increase the total production of winter tomato without using any more
irrigation water than the value used under the traditional cultivation of winter
tomato. Table 5.10 indicated that the added cultivated area will be 7.5 thousand
hectares, which increase the total cultivated area to 77.9 thousand hectares, with
11% increase, compare to the area cultivated with traditional method. Furthermore,
the total production of winter tomato will increase to 3669.1 million tons, with 18%
compared to its value under traditional cultivation.
5.3.3.3 Application of Deficit Irrigation
Shalaby et al. (2014) and Kamal and El-Shazly (2013) indicated that saving 25% of
the applied irrigation water to tomato grown under drip system resulted in 7–9%
yield losses. Based on these results, we assumed that 7 and 5% of the applied irrigation water to tomato could be saved in the old and new lands, respectively with yield
losses 4 and 5%, respectively. Table 5.11 showed that 5.0 thousand hectares of winter tomato could be added.
Table 5.11 also showed that this added area could increase the total cultivated
area to 82.9 thousand hectares, with 18% increase, compare to the area cultivated
with traditional method. Thus, the total production of winter tomato will increase to
3873.0 million tons, with 24% compare to its value under traditional cultivation.
5.3.3.4 Water Conservation and Winter Tomato National Production
Cultivation on raised beds and application of deficit irrigation to tomato resulted in
saving in the applied irrigation water by 34.3 and 22.7 million cubic meters, respectively, or 9 and 6% of the applied irrigation under traditional cultivation (Table 5.12).
5 Vegetable Crops and Deficit Irrigation in Egypt
million ton of winter tomato in the old and new lands, respectively and consumed
171.6 and 192.8 million cubic meters of irrigation water in the old and new lands,
respectively (Table 5.8).
Table 5.9 indicated that the total cultivated area of winter tomato was 70.4 thousand hectares, produced 3.119.1 million tons of winter tomato and consumed 364.4
million cubic meters of irrigation water. This amount of national onion production
is enough for local consumption (Central Agency for Public Mobilization and
Statistics 2018).
5.3.3.2 Cultivation on Raised Beds
Similar to the previous studied crops, we assumed that cultivation of winter tomato
on raised beds will increase its yield by 15% and save 20% of its water requirements
in the old lands only. The saved irrigation water could be used to cultivate more
lands and increase the total production of winter tomato without using any more
irrigation water than the value used under the traditional cultivation of winter
tomato. Table 5.10 indicated that the added cultivated area will be 7.5 thousand
hectares, which increase the total cultivated area to 77.9 thousand hectares, with
11% increase, compare to the area cultivated with traditional method. Furthermore,
the total production of winter tomato will increase to 3669.1 million tons, with 18%
compared to its value under traditional cultivation.
5.3.3.3 Application of Deficit Irrigation
Shalaby et al. (2014) and Kamal and El-Shazly (2013) indicated that saving 25% of
the applied irrigation water to tomato grown under drip system resulted in 7–9%
yield losses. Based on these results, we assumed that 7 and 5% of the applied irrigation water to tomato could be saved in the old and new lands, respectively with yield
losses 4 and 5%, respectively. Table 5.11 showed that 5.0 thousand hectares of winter tomato could be added.
Table 5.11 also showed that this added area could increase the total cultivated
area to 82.9 thousand hectares, with 18% increase, compare to the area cultivated
with traditional method. Thus, the total production of winter tomato will increase to
3873.0 million tons, with 24% compare to its value under traditional cultivation.
5.3.3.4 Water Conservation and Winter Tomato National Production
Cultivation on raised beds and application of deficit irrigation to tomato resulted in
saving in the applied irrigation water by 34.3 and 22.7 million cubic meters, respectively, or 9 and 6% of the applied irrigation under traditional cultivation (Table 5.12).
5 Vegetable Crops and Deficit Irrigation in Egypt