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Potassium as one of the most consumed elements has an important role Iranian Pistachio in increasing the yield and yield of pistachio trees. The role of potassium is very important and important, especially in fertile years, and potassium fertilizers must be added to orchards in fertile years.

 

Studies have shown that in pistachio trees, after nitrogen, the highest amount of element that is extracted from the soil annually is potassium. The highest amount of potassium uptake occurs mainly in the grain filling stage.

 

Studies have shown that in fertile years, absorbed potassium trees are consumed directly in the formation of the pistachio embryo or kernel, but in infertile years, the absorbed potassium is stored by the roots in other organs.

 

This is why the concentration of potassium in the leaves of fertile years is lower than the concentration of potassium in the leaves in infertile years. Studies have also shown that the amount of potassium absorption in the fertile years during the period of brain filling is almost more than twice the amount of potassium absorption in the years of infertility.