Journal of Forest Science, 2015 (vol. 61), issue 12

INDEX OF VOLUME 61Index

editors

J. For. Sci., 2015, 61(12):I-IV | DOI: 10.17221/8631-JFS  

Relation between terrain and operating conditions of forest skiddersOriginal Paper

J. Mikleš, M. Mikleš

J. For. Sci., 2015, 61(12):515-519 | DOI: 10.17221/59/2015-JFS  

A model of the probability of operating conditions describes running of the examined unit in form of connected probabilities of occurrence of monitored operating factors can be stochastically dependent or independent. Operating factors will be divided, in order to the opportunity of the monitoring, on the quantification of the probability model of the forest skidder, into two parts: terrain conditions (micro and macrorelief of the terrain) and operating conditions (a line of operation, a load, a distance). In this paper opportunities are sought of the relationship between terrain conditions and operating conditions in the defined signification. A field...

Road network analysis for timber transportation from a harvesting site to mills (Case study: Gorgan county - Iran)Original Paper

A. Parsakhoo, M. Mostafa

J. For. Sci., 2015, 61(12):520-525 | DOI: 10.17221/67/2015-JFS  

We summarized the results of the Road Network Analysis (RNA), when the shortest path to reduce travel time in the Gorgan city public road network, in Iran, was evaluated. The main objective was to determine whether by using a GIS-based new route approach it is possible to determine the shortest path from logging site to destination (mills). The results showed that by using the concept of travel time as a measure of the importance of nodes, the shortest path from origin to destination was found. A path with minimum links and lengths as well as maximum vehicle speed is the best. This dramatically reduced the search complexity in terms of routing.

Residual damage in different ground logging methods alongside skid trails and winching stripsOriginal Paper

N. Badraghi, J. Erler, S.A.O. Hosseini

J. For. Sci., 2015, 61(12):526-534 | DOI: 10.17221/50/2015-JFS  

To assess the residual damage a 100% inventory method was employed in pre-hauling and post-hauling, alongside skid trails and winching strips. Inventory was executed within 6 m from each side of the skid trail or winching strip centreline (12 m width). Besides the data analysis to choose the best alternative depending on residual damage the Analysis of Multiple-criteria Approval (MA) was applied. In the winching strip, our results demonstrated that depending on the density of standing residual trees the most unfriendly alternative to standing trees was a short-length method (SLM) which damaged 27.9% of the total standing trees and the best alternative...

Individual tree basal area growth models for Chir pine (Pinus roxberghii Sarg.) in western NepalOriginal Paper

A. Gyawali, R. P. Sharma, S.K. Bhandari

J. For. Sci., 2015, 61(12):535-543 | DOI: 10.17221/51/2015-JFS  

The individual tree growth models are important decision-making tools in forestry. Age dependent and age independent individual tree basal area growth models were developed for Chir pine (Pinus roxberghii Sarg.) in one of the western districts, Rukum district, in Nepal. Data from thirty-five destructively sampled trees, which were representative of all possible stand densities, site productivities, age classes, and size classes of Chir pine forests in the district, were used. Sample trees were felled and diameters and ages were measured on the cut surface of the stump (at 30 cm above the ground). Since measurements from the same stump of a...

Acid phosphomonoesterase activity as affected by salicylic acid and its relation to selected biochemical characteristics in soils of Norway spruce standsOriginal Paper

S. Kočvarová, J. Pecháček, K. Rejšek, V. Vranová

J. For. Sci., 2015, 61(12):544-550 | DOI: 10.17221/101/2015-JFS  

The main aim of the study was to determine extracellular acid phosphomonoesterase activity in soil with and without addition of salicylic acid. Some other important chemical and physical features of soil were also investigated including the content and seasonal dynamics of bioavailable phosphorus and water soluble carbohydrate contents. Soil samples were collected at a depth of 5 cm (H horizon) at the Rájec-Němčice Ecosystem Station (southern Moravia, Czech Republic) in three differently managed Norway spruce pure stands. No correlation was found between the acid phosphomonoesterase activity and phosphorus content. The addition of salicylic acid reduced...

Evaluation of the IUFRO provenance plot with grand fir in the Habr locality (Western Bohemia) at the age of 31 yearsOriginal Paper

R. Krejzek, P. Novotný, V. Podrázský, F. Beran, J. Dostál

J. For. Sci., 2015, 61(12):551-561 | DOI: 10.17221/74/2015-JFS  

In the framework of an international IUFRO provenance research of grand fir (Abies grandis/D. Don/ Lindl.), a series of research plots was established in the Czech Republic in 1980-1982. This paper focuses on an evaluation of experimental plot No. 213 - Habr (Western Bohemia), where 24 provenances of grand fir are investigated. Results of the evaluation of height, diameter at breast height, volume of large timber (diameter outside bark > 7 cm), and some qualitative parameters are presented for the age of 31 years. Results of the plot evaluation showed the best growth in provenances originating from the Washington state coastal region. Individuality...