The role of copper in pistachio shell plants
This element is similar to zinc (ZN) in plants, except that its concentration is very low. Copper is usually present in sufficient quantities to meet the plant needs in uncovered soils that are low in organic matter and there is no shortage of such soils.
In soils with high organic matter (peat soils) copper deficiency can be expected if alkaline. In orchards that have long used animal and poultry manure, the amount of copper in the leaves of trees is very low.