The length of the cluster in Ahmad Aghaei and Akbari isidentical, while the cluster width is greater in the first variety. In other words, Ahmad Aghaei has open nut clusters, resulting in thinner ones too. Ahmad Aghaei produces a greater percentage of split nuts (an important commercial character) than Kale gnocchi or Fandoghi while maintaining a low rate of blank (which are commercially unfavorable criteria and do not contribute to yield) and closed-shells nuts. In pistachio, alternate bearing that may be a marketing problem is common, with fruit production fluctuating between 'on' years of high and 'off' years of low yields. In Ahmad Aghaei, alternate bearing severity is relative I= 0.7, but it has a heavy yield potential (1).
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