Abstract
The present study aimed to estimate water use efficiency for cauliflower crop production using different irrigation water sources. This research was carried out during the seasons of 2018-2019 in the Research Field Station of the College of Agricultural Engineering Sciences, University of Sulaimani. The experiment was laid out in randomized complete block design with three treatments and three replicants. The cauliflower plants were grown under a surface irrigation system. The three treatments were: (I1) River water irrigation and (I2) Sewage water irrigation during the entire growing seasons from planting to harvest, and (I3) alternate irrigation which meant one river irrigation water followed by two sewage irrigation water, alternatively. The results showed that the means of irrigation water requirements were 441, 457, and 427 mm for river water, sewage water, and alternate irrigation, respectively. It is observed that I3 had significantly higher WUEc (6.33kg m-3) and compared with other treatments I1 and I2 (5.13 and 4.27 kg m-3), respectively.
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