Determination of wood volume losses and financial loss due to cutting garden trees (Case study: Langaroud County)

The occurrence of log damage happens at different stages of logging, but minimizing it is one of the principles of proper logging. The purpose of this study was to estimate the wood volume losses during the harvesting stages of garden trees in Langaroud County. In order to calculate the wood value loss following tree felling, the selection sampling method was used. In total, 52 trees consisting of oak (Quercus castaneifolia C.A. Mey), Caucasian wingnut (Petrocarya fraxinifolia (Lam.) Spach), alder (Alnus glutinosa L.), elm (Ulmus carpinifolia Borkh.), and maple (Acer velutinum Boiss.) species across three diameter classes of 20-40, 40-60, and >60 cm were measured. Two-way ANOVA and Duncan tests were used to analyze the data. The results showed that the sum of wood loss rates in oak, Caucasian wingnut, alder, elm, and maple species are 0.644, 0.467, 0.610, 0.466, and 0.499 m3, respectively. Additionally, the results showed that with the increase of diameter classes, the rate of wood loss increased in all species. The results of the ANOVA test showed that there was a significant difference between the volumes of wood loss in the diameter classes, but there was no significant difference between different species. The cross impact of diameter classes and tree species on the rate of volume wood loss did not show any significant difference. The results of the Duncan test showed that there was a significant difference in volume wood loss in the tree diameter classes. The results also showed that the volume wood loss in all species (52 trees) is 2.686 m3, with a value of 148,389,000 Rials. In general, the results indicate that by reducing the wood volume loss, it is possible to increase income from cutting and selling wood products.