to assess the effect of irrigation levels on vegetative growth and yield characteristics in white onion on micro-irrigation system. In the present investigation white onion variety Alibag local was tested under three irrigation levels namely I 1 (no deficit), I 2 (20% deficit) and I 3 (40 % deficit) on mini-sprinkler (M 1) and micro-sprinkler (M 2) irrigation methods, while the conventional check basin method was taken as control. The maximum average yield was attained in irrigation level I 1 as 39.82 t/ha, whiles the minimum average yield of 24.97 t/ha was recorded for irrigation level I 3. The maximum yield of 42.37 t/ha was recorded for treatment combination M 2 I 1 followed by treatment combinations M 1 I 1 (37.26 t/ha) and M 2 I 2 (36.03 t/ha). In control treatment the yield of 17.52 t/ha was recorded. The maximum water use efficiency 14.51 q/ha-cm was reported in treatment combination M 2 I 1 and the minimum water use was found 10.98 q/ha-cm in treatment combination M 1 I 3. The fertilizer use efficiency followed the same trend. The maximum fertilizer use efficiency 176.12 was recorded in treatment combination M 2 I 1 and minimum 99.54 was obtained in treatment combination M 1 I 3. In control fertilizer use efficiency was 73.01, which was lowest amongst all treatments.
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