Journal of Forest Science, 2002 (vol. 48), issue 1
Conversion of a forest managed under systems involving coupes to a selection forest on an example of the Opuky research areaOriginal Paper
J. Souček
J. For. Sci., 2002, 48(1):1-7 | DOI: 10.17221/11851-JFS 
This paper evaluates the development of growing stock, number of trees and diameter distribution of the standing volume in the Opuky locality where conversion to a selection forest has been the aim of management over a long period of time. With respect to species composition, the stand is divided into two plots. The initial condition and development of both plots differed. The favourable initial composition of the stand has gradually deteriorated due to delay in natural regeneration and therefore recruitment of young trees over a long period. The total number of trees on both plots has been low for target diameter of 51 cm. On the other hand, the growing...
Age and diameter classes or growth stages as criteria for the implementation of thinningitle not given--Original Paper
R. Petráš
J. For. Sci., 2002, 48(1):8-15 | DOI: 10.17221/11852-JFS
Age and diameter classes or growth stages as criteria for the implementation of thinning
Effect of site altitude on the growth and survival of Norway spruce (Picea abies L.) provenances on the Slovak plots of IUFRO experiment 1972Original Paper
M. Pacala, R. Longauer, D. Krajmerová, D. Gömöry
J. For. Sci., 2002, 48(1):16-26 | DOI: 10.17221/11853-JFS
The growth, survival, damage and provenance × environment interactions of 30 provenances of Norway spruce (Picea abies L.) from Poland, Slovakia and the Czech Republic, were analyzed at the age of 26 years. Significant effects of altitude and site quality but no geographic trends were dectected in the series of 5 provenance plots. Correlation of growth and survival appeared to be insignificant at individual plots and their series. The highest differentiation among provenances was revealed on the plots at the minimum and maximum altitudes (350 and 950 m). Several Slovak (Western-Carpathian) provenances proved to grow significantly better than...
Soil moisture in mountain spruce standOriginal Paper
L. Tužinský
J. For. Sci., 2002, 48(1):27-37 | DOI: 10.17221/11854-JFS
Mountain forests are among the main components of natural environment in Slovakia. They grow mainly in areas with cold climate, on poor soils with unfavorable reaction, often very acidic (pH in H2O < 4.5) and with nutrient deficit. Immissions and acid rain attack forests to a great extent. Global climate changes also represent a new threat. Extremes in air temperatures, excessive amounts of precipitation or on the other hand the lack of water from precipitation, torrential rains or long-lasting drought periods are recorded as a result of a higher amount of heat energy accumulation from the greenhouse effect. Spruce forests are most endangered....
Tradable permits in logging operationsOriginal Paper
M. Dragoi
J. For. Sci., 2002, 48(1):38-48 | DOI: 10.17221/11855-JFS
The paper presents a new system of tradable permits combined with ecological bonds that is able to promote environment-friendly logging technologies, supposed to be less harmful to the forest ecosystem. All loggers deposit in advance ecological bonds on to-be-harvested volume basis and a certain number of permits to damage is freely given per each cubic meter, by the public authority. After surveying the damage caused throughout all harvested tracts, the number of permits on the volume basis is recomputed for each logger according to the magnitude and importance of damage caused. The logging company that caused smallest damage and saved most permits...