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6). In 2002, 2004 and 2009 according to Ryznar index, 84.17, 97.12 and 98.45 percent of the wells in the area had a tendency to corrode. According to the Wilcox classification method, almost all of the samples classified in 'good' class, and have no restriction to use in agriculture]]>
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4 ms-1) during growth season. Additionally, to simulate distribution patterns and coefficients of uniformity of two more sprinklers of MEGA RC 130H and VYR 70, Ador-Sprinkler software was applied in the different wind speeds and sprinklers spacing. The results showed that the difference between day and night time wind speeds is relatively significant in the spring months, while that is almost negligible in the summer. Generally, in the growth season, night time irrigation improves application uniformity up to 3.46% for experimental sprinklers in comparison with day time irrigation. For simulated sprinklers this value was calculated 2.84%, averagely. Regarding to the obtained results it can be stated that night time irrigation practice in the spring and summer months is recommended due to lower wind drift values and lower evaporation losses, respectively.
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