Journal of Forest Science, 2010 (vol. 56), issue 7
Soil characteristics under selected broadleaved tree species in East Norway
K. Rejšek, O. Haveraaen, A. Sandnes, K. Somerlíková
J. For. Sci., 2010, 56(7):295-306 | DOI: 10.17221/86/2009-JFS 
Comprehensive analyses of soil properties of sites of native Scandinavian broadleaved tree species were performed in 36 habitats in East Norway. The material consisted of stands of silver birch (Betula pendula Roth.), white birch (Betula pubescens Ehrh.), black alder (Alnus glutinosa Gaertn.), speckled alder (Alnus incana Moench.), European ash (Fraxinus excelsior L.), pedunculate oak (Quercus robur L.) and sessile oak (Quercus petraea [Matt.] Liebl.). The main objective was to describe the vertical characteristics and variations in some selected soil variables of the soil profiles. Particular...
Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed
V. Černohous, F. Šach, D. Kacálek
J. For. Sci., 2010, 56(7):307-313 | DOI: 10.17221/103/2009-JFS
Runoff generation under various natural conditions has often been studied in forested watersheds for a long time. In 1967, Hewlett designed a variable source area model. The model is based on the expansion and shrinkage of variable source areas and consequent changes in a drainage network during a discharge event. The runoff investigation was carried out in a forested watershed situated in the summit area of the Orlické hory Mts. The watershed has a drainage area of 32.6 ha with the land-surface elevation ranging from 880 to 940 m a.s.l. Runoff components, their amounts and ratios were calculated using a simple graphical-mathematical method of the...
Evaluation of the growth and health status of selected clone mixtures in comparison with ordinary planting stock
J. Leugner, A. Jurásek, J. Martincová
J. For. Sci., 2010, 56(7):314-322 | DOI: 10.17221/92/2009-JFS
The present paper compares the growth of parent trees and potentially stress-tolerant mixtures of clones of Norway spruce (Picea abies [L.] Karst.) progenies coming from a specific locality near the Černá hora peat bog in the Krkonoše Mts. Growth was studied in generative ortet plantations in Trutnov locality and in a mountain ortet plantation Lesní bouda, in the 1st generation clone plantation Benecko and in the 2nd generation clone plantation in the Černohorská rašelina locality. In the latter locality chlorophyll fluorescence and water losses during controlled desiccation were also measured in selected clones compared...
Stability of the development of basic stand parameters of beech yield tables constructed on the basis of short-term observations on research plots
R. Petráš, J. Mecko
J. For. Sci., 2010, 56(7):323-332 | DOI: 10.17221/83/2009-JFS
We compared the development of yield curves of mean and top height and development of mean diameter according to yield tables of beech which were constructed on the basis of short-term investigations with empirical data of repeated measurements on permanent research plots. We performed our study on 86 permanent research plots with 550 repeated measurements. The length of the interval of repeated measurements on the research plots is in the range of 10-43 years. We quantified differences in the development of model and empirical curves by help of basic statistical characteristics. The results show that the actual growth of mean heights is more intensive...
Timber harvesting in the ukrainian carpathians: Ecological problems and methods to solve them
N. Byblyuk, O. Styranivsky, V. Korzhov, V. Kudra
J. For. Sci., 2010, 56(7):333-340 | DOI: 10.17221/111/2009-JFS
The paper contains results of comparative investigations of crawler and wheeled skidders regarding their effect on soil surface, undergrowth and rut formation during mountain timber harvesting. It was shown that the extent of erosion resulting from damage to the soil surface depends on the steepness and length of slopes during both construction of skidding tracks and skidding by tractors. Considering the current condition of development of timber harvesting machinery, the use of crawler machines is the main method for transportation of cargos in regions with difficult access.