The number of tuber per plant was not significantly affected by irrigation methods in the
both years (Table 7). The irrigation level of 66 and 33% resulted in significantly higher
tuber number per plant in 2000, while the irrigation level of 66% resulted in highest number
of tuber per plant in 2002 (Table 7). Both the un-irrigated (I0) and the full-irrigated (I100)
potatoes produced lower number of tuber per plant in both irrigation methods in both years
(Table 7). Decrease in the number of tuber under un-irrigated conditions was also reported
by many authors (MacKerron and Jefferies, 1988; Haverkort et al., 1990; Walworth and
Carling, 2002). Foti et al. (1995) reported a decrease in the number of tuber per plant to the
level of un-irrigated control with water supplied as 100% of maximum evapotranspiration
(ETM) in one year of two-year study in Italy. They obtained the highest number of tuber per
plant with water supplied as 66% of ETM in the same year, but there were no differences in
the number of tuber between water levels in the second year. Similarly, Karafyllidis et al.
The number of tuber per plant was not significantly affected by irrigation methods in the
both years (Table 7). The irrigation level of 66 and 33% resulted in significantly higher
tuber number per plant in 2000, while the irrigation level of 66% resulted in highest number
of tuber per plant in 2002 (Table 7). Both the un-irrigated (I0) and the full-irrigated (I100)
potatoes produced lower number of tuber per plant in both irrigation methods in both years
(Table 7). Decrease in the number of tuber under un-irrigated conditions was also reported
by many authors (MacKerron and Jefferies, 1988; Haverkort et al., 1990; Walworth and
Carling, 2002). Foti et al. (1995) reported a decrease in the number of tuber per plant to the
level of un-irrigated control with water supplied as 100% of maximum evapotranspiration
(ETM) in one year of two-year study in Italy. They obtained the highest number of tuber per
plant with water supplied as 66% of ETM in the same year, but there were no differences in
the number of tuber between water levels in the second year. Similarly, Karafyllidis et al.
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