It is important to study the amount of wood loss in terms of volume and economy. Damage to the wood of the trees harvested during the operation is one of the most important things that forestry planners and wood producers must pay attention to. Large volumes (about 30 to 40 percent) of standing trees are lost during forest logging. Hyrcanin forest is the only economic forest of Iran that play key role in environmental issue. Therefore, increasing productivity and reducing tree harvesting in this ecosystem is essential. It is essential to determine the amount of wood damaged during the cutting and pruning process and to provide solutions to prevent and reduce the effects of wood damage during logging in hyrcanin valuable forest.
