TEHRAN, Dec. 17 (MNA) – Pruning of a tree is carried out during winter season which is called as ‘black pruning’. Pruning is done in specific period of the year when the plant loses its leaves. Branch is the most important part of the tree for pruning, because, branches play an important role in resistance of plant against external pressures such as wind, cold and also weight of fruits.

                                                                              

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