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چکیده
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The transformation of forest products from forest-logged products (lumber etc.) into logs will reduce the pressure on the northern forests of Iran in addition to improving the forest product's values. In order to investigate the altering trend of the woody products yielded from the northern forests of Iran, the statistics concerning the production rate of each of the products (i.e. logs, lumber, bolts, traverse, pole wood and charcoal) were prepared. To give a comparison on the product's variation trend, the data were converted into the percent of total annual wood production. The results showed that logs, bolts, and fuel woods have had an increasing trend while lumber, charcoal, and traverses followed a declining way. Meanwhile, pole wood's trend showed to be constant during the time. The increase in logs and fuel wood along with the decrease in lumber and traverse can be mainly attributed to the reasons including the recent improvement of forest road construction over the region, the application of powerful forest harvest machine, the alteration in wood consumption pattern in northern country, the changes in the general wood application, increasing the use of oil fuels, enrichment of the technological capabilities, and higher values of logs.
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