Template-Type: ReDIF-Article 1.0 Author-Name: M. Akbarimehr Author-Workplace-Name: Department of Forestry, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Mazandaran, Iran Author-Name: H. Jalilvand Author-Workplace-Name: Department of Forestry, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Mazandaran, Iran Title: Considering the relationship of slope and soil loss on skid trails in the north of Iran (a case study) Abstract: With increasing mechanization of forest harvesting operations the impacts on soil have increased quite dramatically. The objective of this paper was to examine the relationship of slope and soil loss. This research was carried out in parcels 14 and 26 of the third district of Nav-Asalem forest in the north of Iran. Erosion plots were 75, 150 and 225 m2 with two slope classes. After each rainfall event the amount of runoff was measured; then, a sample was taken to determine the weight of soil loss. The results of correlation analysis by Pearson's test between soil loss and slope classes, soil loss and slope length showed that there was a significant (P < 0.05) and positive correlation between the mentioned factors. Also, linear regression between soil loss, slope length and slope gradient was significant. It could be concluded that studying and underlying factors that increase soil loss such as soil type, rainfall intensity, should also be taken into consideration in future. Skid trail construction and skidding should be limited to the slope of < 20%; machine traffic should be restricted. The above-mentioned conclusions can be applied to proper harvesting and management of forest ecosystems. Keywords: harvesting, runoff Journal: Journal of Forest Science Pages: 339-344 Volume: 59 Issue: 9 Year: 2013 DOI: 10.17221/34/2013-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/34/2013-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201309-0001.txt Handle: RePEc:caa:jnljfs:v:59:y:2013:i:9:id:34-2013-JFS Template-Type: ReDIF-Article 1.0 Author-Name: I. Kupka Author-Workplace-Name: Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: V. Podrázský Author-Workplace-Name: Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: J. Kubeček Author-Workplace-Name: Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Soil-forming effect of Douglas fir at lower altitudes - a case study Abstract: Forest ecosystem and in particular forest soil biodiversity and stability could be jeopardised by the impropriate tree species composition. Douglas fir is a species which has a high potential in Europe both from economic and biodiversity aspects of forest management. A more detailed analysis of Douglas fir effects on the humus forms and forest soil under different conditions is needed to evaluate the future use of this species in central European forests. The study plots cover acid sites with natural hardwood, spruce monoculture and Douglas fir stands. The soil analysis proved favourable effects of this species on soil chemistry, organic matter as well as nutrient dynamics. When compared with domestic coniferous species, Douglas fir proved to have lower acidifying effects on upper soil layers and contributes to better humus forms, recycling nutrients more effectively and producing litter which could be easily decomposed. Keywords: tree species composition, forest soil changes, Norway spruce, nutrient cycle Journal: Journal of Forest Science Pages: 345-351 Volume: 59 Issue: 9 Year: 2013 DOI: 10.17221/27/2013-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/27/2013-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201309-0002.txt Handle: RePEc:caa:jnljfs:v:59:y:2013:i:9:id:27-2013-JFS Template-Type: ReDIF-Article 1.0 Author-Name: D. Sychra Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Author-Name: O. Mauer Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Title: Prosperity of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) plantations in relation to the shelter Abstract: The study evaluates the mortality, growth and qualitative characteristics of Douglas fir transplants planted out on clear-cut areas with different shelter. We assessed 11 clearings situated in the Forest Site Complex 4K - acidic beech (Fagetum acidophilum). The young trees were assessed 3 years after planting for the following parameters: total shoot length, increment, root collar diameter, number of multiple stems, stem curvature, crown form, length of needles, colour of needles and frost damage. The lowest mortality and the best growth of Douglas fir plants were recorded in small, sheltered gaps. Large, unsheltered gaps showed low survival, slower growth and poor vitality of plants. Keywords: forest regeneration, clear-cut area size Journal: Journal of Forest Science Pages: 352-358 Volume: 59 Issue: 9 Year: 2013 DOI: 10.17221/84/2012-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/84/2012-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201309-0003.txt Handle: RePEc:caa:jnljfs:v:59:y:2013:i:9:id:84-2012-JFS Template-Type: ReDIF-Article 1.0 Author-Name: B. Lomský Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: V. Šrámek Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Author-Name: R. Novotný Author-Workplace-Name: Forestry and Game Management Research Institute, Jíloviště-Strnady, Czech Republic Title: The health and nutritional status of Norway spruce stands in the Krušné hory Mts. 15 years subsequent to the extreme winter of 1995/96 Abstract: Since 1994, the nutritional status and the air pollution load have been evaluated on 20 research plots, located in young Norway spruce stands in the ridge area of the Krušné hory Mts. The most recent acute damage to the spruce stands, in the winter of 1995/96, was connected with a long-lasting inversion situation in the eastern area of the Krušné hory Mts. Today, the health status of the spruce stands, expressed in terms of the crown defoliation, has recovered and is comparable to that found in other regions of the Czech Republic. The sulphur and fluorine content of the needles has decreased significantly. The long-term negative effect of acid deposition that contributes to the degradation of forest soils remains an important part of stressors acting on forest ecosystems in the region. In recent years, nitrogen and sulphur concentrations in the needles have increased slightly again. A long-term tendency towards a decrease in the phosphorus, calcium and potassium content of the needles was detected. Keywords: forest health, tree nutrition, air pollution, Ore Mts Journal: Journal of Forest Science Pages: 359-369 Volume: 59 Issue: 9 Year: 2013 DOI: 10.17221/37/2013-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/37/2013-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201309-0004.txt Handle: RePEc:caa:jnljfs:v:59:y:2013:i:9:id:37-2013-JFS Template-Type: ReDIF-Article 1.0 Author-Name: A. Skoupý Author-Workplace-Name: Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: J. Vanbelle Author-Workplace-Name: Inverde VZW, Ingelmunster, Belgium Author-Name: J. Zöscher Author-Workplace-Name: Bundesamt und Forschungszentrum für Wald, Ossiach, Austria Author-Name: T. Lampe Author-Workplace-Name: Citogroep Holding, Arnhem, The Netherlands Author-Name: F. Esser Author-Workplace-Name: Forstliches Bildungszentrum Rheinland-Pfalz, Hachenburg, Germany Author-Name: V. Turpeinen Author-Workplace-Name: Häme Vocational Institute of Forestry Training, Hämeenlinna, Finland Author-Name: P. Caseau Author-Workplace-Name: Centre Forestier de la région Provence Alpes Côte d'Azur, La Bastide des Jourdans, France Author-Name: P. Máchal Author-Workplace-Name: Mendel University in Brno, Brno, Czech Republic Author-Name: R. Klvač Author-Workplace-Name: Mendel University in Brno, Brno, Czech Republic Author-Name: V. Nový Author-Workplace-Name: Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: T. Embo Author-Workplace-Name: Inverde VZW, Ingelmunster, Belgium Title: Partial evaluation of questionnaires monitoring the need of knowledge in forest workers from selected EU countries Abstract: The paper informs about partial results gathered and processed in the framework of the international research project "Learn for Work", Leonardo da Vinci programme. The goal of the research project was to acquire information about the subjective perception of importance and subsequent use of theoretical knowledge in practical use in the forest worker occupation. The research, monitoring the practical need of theoretical knowledge of workers in the forest, was realized in selected six countries of the European Union - Belgium, Austria, France, Finland, Germany and Czech Republic. Another objective of this research was to find out whether there are significant differences in opinions concerning the need of theoretical knowledge in respondents from the individual countries. Partial results presented in the paper relate to the measure of practical need and use of theoretical knowledge in physics for the occupation of forest worker. The acquired data are interpreted and discussed in the context of analogical research studies implemented abroad as well as in the Czech environment. Keywords: European forest worker, eligibility, subject area of physics, theoretical knowledge, practice, certification Journal: Journal of Forest Science Pages: 370-375 Volume: 59 Issue: 9 Year: 2013 DOI: 10.17221/36/2013-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/36/2013-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-201309-0005.txt Handle: RePEc:caa:jnljfs:v:59:y:2013:i:9:id:36-2013-JFS