نبذة مختصرة : One potential management approach that can minimize water use with just a slight reduction in crop output is deficit irrigation. In addition, there is a dearth of research on how the semiarid environment of Kirkuk affects the Mineral Composition of green crops like red cabbage due to a combination of water shortage and water quality. Therefore, this study was initiated to unveil the combined effect of varying deficit irrigation levels (0.5, 0.75, 1, and 1.2 of full irrigation) and two types of water quality (fresh and saline water) on Total sugar, chlorophyll, and proline of red cabbage under drip irrigation with evaluating two types of(Gr, Turbo) emitters. The results indicated that there is a steady increase in Total sugar with an increase in the level of irrigation with saline water over the entire range of applied water. The highest proline content was achieved under the combined effect of saline water and GR emitter when the level of applied water at full irrigation was reduced by a factor of 0.5 (163.03 μmol/g). Furthermore, the highest value for chlorophyll content for Gr emitter under 1.2%IF with fresh water was (142 mg/100g). The drip irrigation system was evaluated at the beginning and middle of the experiment. The result was shown to outperform the GR emitter on the Turbo emitter in four qualities Standard Deviation of Discharges (Lh-1), Statistical Uniformity Coefficient Us(%), Coefficient of manufactured variation (CV%), and Design Emission Uniformity (EU%) which was (0.0605 Lh-1),(98.07 %),(0.01%) and (99.45%) respectively.
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