Journal of Forest Science, 2013 (vol. 59), issue 12

Index of volume 59Index

editors

J. For. Sci., 2013, 59(12):I-IV | DOI: 10.17221/7177-JFS  

Determination of correction coefficient of average skidding distance according to the existing road network in Alikia Soltan forest of IranOriginal Paper

M. Rezaei, F. Shafizade, M.A. Rezaei

J. For. Sci., 2013, 59(12):475-478 | DOI: 10.17221/87/2012-JFS  

One of the factors in planning forest roads is average skidding distance which is calculated in projects from the map, according to forest road density, however it has a low accuracy. In this study real average skidding distance and theoretical average skidding distance were measured to determine a correction coefficient in Alikia Soltan forest in Hyrcanian forest. In this study real average skidding distance was obtained by putting a meter on the axes of trails. Moreover, theoretical average skidding distance was calculated by means of road density according to the formula. Skid trails were recorded by GPS and overlaid to a topographic map by means...

Selecting the efficient harvesting method using multiple-criteria analysis: A case study in south-west Western AustraliaOriginal Paper

M.R. Ghaffariyan, M. Brown

J. For. Sci., 2013, 59(12):479-486 | DOI: 10.17221/45/2013-JFS  

Different factors can impact on the timber harvesting methods including stand characteristics, ground conditions, extraction distance, climate, silvicultural treatments and social interests. The multiple-criteria analysis is an effective methodology for helping foresters decide what system to apply depending on their operations specifications. Four harvesting methods were compared in Western Australian Eucalypt plantations including cut-to-length (CTL), in-field chipping using a delimbing and debarking flail integrated with the chipper (IFC-DDC), in-field chipping using a chipper with a separate flail machine for delimbing and debarking (IFC-F/C) and...

Analytical hierarchy process to choose the best earthwork machine in northern forests of IranOriginal Paper

A. Parsakhoo, S.A. Hosseini

J. For. Sci., 2013, 59(12):487-492 | DOI: 10.17221/44/2013-JFS  

This study attempts to use the analytical hierarchy process to choose the most appropriate earthwork machine for slope classes of 30-50% and 50-70%. Required data were collected by pairwise comparison as questionnaires filled by experts of forest engineering. Results showed that cross-sections and grade line (Technical criteria), soil excavation and displacement (Environmental criteria), production rate and multi-application (Operational criteria), production cost (Economic criteria) with the respective weights of 0.345, 0.345, 0.136, 0.058, 0.058 and 0.058 were the most important criteria for choosing the earthwork machines in the slope class of...

Attractiveness of Picea pungens to the bark beetle species Ips amitinus (Eichh.) and Pityogenes chalcographus (L.)Original Paper

E. Kula, R. Kajfosz, J. Polívka

J. For. Sci., 2013, 59(12):493-502 | DOI: 10.17221/70/2013-JFS  

Only two cambioxylophagous species (Ips amitinus and Pityogenes chalcographus) were found on sections of Picea pungens and Picea abies that belong to economically important pests of Norway spruce. Representatives of the Isarthron sp. (Cerambycidae) were developed on the examined sections of both P. abies and P. pungens. The monitoring of attractiveness of the spruce species P. pungens and P. abies to cambioxylophages revealed that P. pungens was more intensively attacked by I. amitinus while P. chalcographus was more abundant on P. abies....

Relation between selected indicators of forest stand diversity and quality of timber production in young stands aged up to 40 yearsOriginal Paper

J. Merganič, R. Marušák, K. Merganičová, R. Stolariková, L. Tipmann

J. For. Sci., 2013, 59(12):503-513 | DOI: 10.17221/67/2013-JFS  

The present study examines the relationships between the indicators of tree species and structural diversity and the quality of timber production in young even-aged forest stands with the average age below 40 years. The study is based on the forest inventory data from University Forest Enterprise Kostelec nad Černými lesy, Czech Republic, performed from 2009 to 2011. The examined young stands were recorded in 256 sample plots representing 21.2% of the enterprise area. On each sample plot, we quantified 171 partial biodiversity indicators. In total, we analysed 16,416 different variants of the relationship between the diversity indicator and the quality...

Analysis of the perceived condition of forests in the Czech RepublicOriginal Paper

M. Riedl, L. Šišák

J. For. Sci., 2013, 59(12):514-519 | DOI: 10.17221/64/2013-JFS  

A realistic perception of the condition of forests, and the attributes of the forestry sector, by the public constitutes one of the basic prerequisites for successful implementation of forest policy in any country. Although data objectively demonstrate that the condition of Czech forests has improved, opinion polls show a gap between the public perception of the condition of Czech forests and the real status of these forests. The reasons for the discrepancy between reality and the perception of the public, and between the results of different surveys, are analysed. The most significant differences were found in perceptions of damage and threats to...