عنوان مقاله [English]
Presenting a certain scientific approach in forest management planning and utilization guideline with the aim of prediction of forest wood products for a certain period for estimating the income amount and economical balance of the plan is essential. The purpose of this research is to evaluate the existing method in distribution of harvesting between species forming the forest structure and predicting forest products in forest management planning and its effect on income and stumpage price. So, harvesting volume, type of removal species and the estimated forest products in the approved booklet and harvesting program are compared with corresponding numbers of the ten-year implementation of Lavij forest management planning and the result were presented as descriptive and analytical. The results showed that the marked volume by species, volume renewal and predicted wood products based on harvesting manual are not compatible with ten-year operations of the forestry plan. Assuming that the income and cost indices are fixed in all wood product sectors and other operational costs of this plan, the variations obtained through the species, volume and form of wood products caused increase of income and cost 9.29 and 1.03 percent, respectively. The effect of these variations caused the increase of government contribution amount of 237 percent. Consequently, the base stumpage price of industrial stems and fuel woods changed from 5.3% and 1630 Rails to 18.03% and 4808 Rails, respectively.