Journal of Forest Science, 2012 (vol. 58), issue 4
Variation of wood density in Turkish hazel (Corylus colurna L.) grown in the Czech Republic
A. Zeidler
J. For. Sci., 2012, 58(4):145-151 | DOI: 10.17221/73/2011-JFS 
The aim of this study was to investigate the wood density of Turkish hazel (Corylus colurna L.), an introduced species in the Czech Republic. Sample trees coming from a Czech site were tested for basic wood density and oven-dry density according to Czech national standards. Four sections were taken from each tree to evaluate the variability of wood density along the stem height and along the stem radius. The mean values for the basic density and the oven-dry density were 544 kg.m-3 and 627 kg.m-3, respectively. The results show that the highest density can be found in the bottom part of the tree, followed by a decline...
Belowground biomass and its annual increment in a montane beech forest in Mavrovo National Park, north-west Macedonia
S. Hristovski, Lj. Melovski, M. Šušlevska, Lj. Grupče
J. For. Sci., 2012, 58(4):152-164 | DOI: 10.17221/131/2010-JFS
The aim of this paper is to present the results of the investigation on belowground biomass and its annual increment in a beech ecosystem (Calamintho grandiflorae-Fagetum) in Mavrovo National Park, Republic of Macedonia. Belowground biomass was estimated in three layers of the ecosystem (tree, shrub and herb layers) for seven years during the period 1997-2005. Allometric regressions were established for the relationship of root biomass from volume index (D2H, diameter squared × height) on a sample of 10 model trees and 13 model shrubs of European beech (Fagus sylvatica L.). Fine root biomass of trees and shrubs was estimated...
Reducing erosion from forest roads and skid trails by management practices
M. Akbarimehr, R. Naghdi
J. For. Sci., 2012, 58(4):165-169 | DOI: 10.17221/136/2010-JFS
A road network in forest lands provides easy access to forest resources for extraction, regeneration, protection and recreation activities. Erosion from forest roads and skid trails is a major concern in forest management due to the capability to cause adverse environmental effects. The objective of this paper is to introduce two methods for reducing erosion on forest roads and skid trails: water diversion and vegetation cover. Factors affecting erosion on forest roads and skid trails are climate, quality of forest road surfacing material, traffic, slope and vegetation cover. There are several management practices to mitigate the impact of logging...
Soil macrofauna in relation to soil and leaf litter properties in tree plantations
E. Sayad, S.M. Hosseini, V. Hosseini, M.-H. Salehe-Shooshtari
J. For. Sci., 2012, 58(4):170-180 | DOI: 10.17221/58/2011-JFS
Soil communities exert strong influences on the processing of organic matter and nutrients. Plantations of trees, especially of nitrogen fixing ones, may affect the soil macrofauna through litter quality and quantity. This study was conducted in a randomized block design with three blocks consisting of Populus euphratica, Eucalyptus camaldulensis, Eucalyptus microtheca, Acacia farnesiana, Acacia salicina, Acacia saligna, Acacia stenophylla and Dalbergia sissoo monoculture plantations that were established in 1992. Soils and soil macrofauna were sampled in November 2006. Leaf litterfall...
Snow damage to birch stands in Northern Moravia
A. Martiník, O. Mauer
J. For. Sci., 2012, 58(4):181-192 | DOI: 10.17221/48/2011-JFS
The condition and snow damage to stands dominated by birch were studied in the area of interest in Northern Moravia. Based on basal area, the share of birch ranged from 68 to 88%. The stands came to existence on fertile sites through natural regeneration and exhibited growth at a level of the best site classes for the Czech Republic. The most severe snow damage to the stands was recorded at the upper stand height of 8-15 m. The extent of damage in the analyzed stands amounted to 67-95% of all trees. The unambiguously predominant type of damage was bending while breakages were recorded only in up to 4% of trees. Slenderness ratios of intact trees differed...