Journal of Forest Science, 2015 (vol. 61), issue 5
Comparison of the bond strength of oak (Quercus L.) and beech (Fagus sylvatica L.) wood glued with different adhesives considering various hydrothermal exposuresOriginal Paper
P. Král, P. Klímek, D. Děcký
J. For. Sci., 2015, 61(5):189-192 | DOI: 10.17221/95/2014-JFS 
The investigation of the hydrothermal exposure effect on the glue-line strength is obvious when outdoor application of wood products is in option. In our research the bonding quality of oak (Quercus L.) and beech (Fagus sylvatica L.) wood was tested in different conditions according to EN 205. After each exposure the lap joint test specified the shear strength of wood bonded with PVAC and PU adhesive. In our research different behaviour concerning both types of adhesives and selected wood species was observed. The most significant decrease (-80%) of the shear strength was found when the PVAC was used to bond oak wood. Therefore the...
Deforestation modelling using logistic regression and GISOriginal Paper
M. Pir Bavaghar
J. For. Sci., 2015, 61(5):193-199 | DOI: 10.17221/78/2014-JFS
A methodology has been used by means of which modellers and planners can quantify the certainty in predicting the location of deforestation. Geographic information system and logistic regression analyses were employed to predict the spatial distribution of deforestation and detects factors influencing forest degradation of Hyrcanian forests of western Gilan, Iran. The logistic regression model proposed that deforestation is a function of slope, distance to roads and residential areas. The coefficients for the explanatory variables indicated that the probability of deforestation is negatively related to slope, distance from roads and residential areas....
Utilization of STMS markers to verify admixture in clonal progenies of Acacia mapping populations and relabelling using assignment testsOriginal Paper
M.J. Asif, M.A.T. Ariffin, H.M. Yit, M. Wong, M.Z. Abdullah, N. Muhammad, W. Ratnam
J. For. Sci., 2015, 61(5):200-209 | DOI: 10.17221/103/2014-JFS
Clonal propagation is widely used for Acacia breeding and commercial planting. When a large number of clones are handled, problems with mixings are commonly confronted. Detection of admixture in Acacia clones based on morphology particularly at seedling stage is not feasible. However, molecular markers are commonly used to test the genetic fidelity of planting materials. This paper reports the detection of mislabelling in Acacia clonal progenies using a sequence tagged microsatellite (STMS) genetic marker system. Progenies from two mapping populations were clonally propagated and field planted for phenotypic and genotypic...
Considering the soil compaction status on logging areas in a Hyrcanian forestOriginal Paper
S.A.O. Hosseini, M. Akbarimehr, S.F. Emadian, A. Agh
J. For. Sci., 2015, 61(5):210-215 | DOI: 10.17221/48/2014-JFS
This paper deals with the issue of soil compaction during timber harvesting operations on cutting areas. Soil compaction was assessed following the logging operation in Darabkola forest area by measuring soil bulk density. In this research, a completely random sampling method was used to assess the resulting changes in soil bulk density. Soil bulk density was measured using bulk density sampler on felling, bucking, delimbing and control areas. The results showed that the bulk density value in the top soil layer increased with increasing tree volume and was not dependent on the terrain slope on the felling area. Also, there was a significant relationship...
Contribution to a discussion on the influence of coppicing on soil environmentOriginal Paper
P. Kupec, A. Kučera, J. Kadavý, M. Kneifl
J. For. Sci., 2015, 61(5):216-224 | DOI: 10.17221/118/2014-JFS
In 2011, soil properties and stand condition of four forest stands were evaluated at the Křtiny Training Forest Enterprise (Czech Republic). The stands were managed on a long-term basis as an oak-hornbeam coppice undergoing conversion to high forest over the last 110 years approximately. The aim of the study was to compare the current condition of stands and soils with that of 1959. The stands were subjected to (a) an analysis of changes in the species composition during the conversion to high forest, and (b) a soil survey carried out using restored soil pits set up in 1959, as well as shallow pits. Our results indicate significant differences in the...
Effects of afforestation on soil structure formation in two climatic regions of the Czech RepublicOriginal Paper
V. Podrázský, O. Holubík, J. Vopravil, T. Khel, W.K. Moser, H. Prknová
J. For. Sci., 2015, 61(5):225-234 | DOI: 10.17221/6/2015-JFS
The aim of this study was to determine the effect of agricultural land afforestation on soil characteristics. Two sites in two regions of the Czech Republic were evaluated, at lower as well as higher submountain elevations: in the regions of the Orlické hory Mts. and Kostelec nad Černými lesy, afforested, arable and pasture lands were compared for basic chemical and physical characteristics. It was determined: pH, CEC, exchangeable nutrients, SOC, bulk density, volume density, porosity (differentiated by pore size), water conductivity and soil aggregate stability. This study demonstrated the important influence of previous land use upon soil characteristics....