The correct method of sampling pistachio Iranian Pistachio leaves

The concentration of nutrients in the leaves depended on the time, the age of the leaves and its position on the tree, and the absence of fruit and its position in the garden. Also, the base and cultivar of the tree must be identified. Therefore, according to the above, harvesting and sampling of tree leaves is done. And the sample taken varies according to the purpose, for example, if the only problem is the lack of an element in a tree or in an area of ​​the garden, it is enough to take a few leaves from several weak and strong trees.

The correct method of leaf sampling

However, if the goal is to determine the set amount of nutrients in a garden, sampling will be done from a larger number of trees in different parts of the garden. Leaves that have already been sprayed to address the deficiencies of an element should not be used. The collected samples are packed in paper bags with identification labels and delivered to the laboratory up to 24 hours later.

The best harvest season for leaves is July and August. However, if the purpose is only to compare the quality of a strong tree with a weak tree, the sample is taken and analyzed at any time.