Abstract:
The current study was conducted to identify the effect of gibberellic acid (GA3) on pistachio
productivity, blank and split nuts. The experiments were arranged as Split plot design with five
concentrations of GA3 repeated in four replications. The main plot was spray application times
and subplot was GA3 concentrations applied on Ohadi cultivar. Significant differences were
observed between treatments and control (P<0.01). There was significant difference (P<0.01) in
quantity of crop between treatments and control. Most crop was obtained when 2500 mg/l of
GA3 sprayed at 15th January. Lowest blank (10.07%) and highest split nuts (76.69%) were
observed when GA3 was sprayed at 2500 mg/l concentration.
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