Template-Type: ReDIF-Article 1.0 Author-Name: Andrea Majdáková Author-Workplace-Name: Department of Forest Economics and Management, Faculty of Forestry, Technical University in Zvolen Zvolen, Slovak republic Author-Name: Blanka Giertliová Author-Name: Iveta Hajdúchová Author-Workplace-Name: Department of Forest Economics and Management, Faculty of Forestry, Technical University in Zvolen Zvolen, Slovak republic Title: Prediction by financial and economic analysis in the conditions of forest enterprises Abstract: Individual companies need to know their financial condition. They have a wide range of methods and procedures to create a system of the financial and economic analysis of a company. The analysis is focused on the evaluation of a specific group of methods for predicting the financial health of a business entity. Evaluations of the financial situation of a company are divided into point methods, mathematical and statistical methods and neural networks. The individual methods differ from each other in difficulty, in the extent of the analyzed areas and possibilities of application. The aim of this work is to assess the possibilities of using selected methods of comprehensive evaluation of companies as a tool for an analysis of the position of each company in the branch. The suitability and feasibility of each method are tested on a selected group of companies. Quick Test, Tamari Model, Beaver Model are included in this work. Based on the results, improvements and recommendations for the practical use were suggested. The results showed that the best predictive methods are Quick Test and Tamari Model, because they are quick and unequivocal when assessing the analyzed companies. An inappropriate prediction method is the Beaver model, which uses only two financial indicators to evaluate companies. Keywords: financial and economic analysis, prediction analysis, Quick test, Tamari model, Beaver model Journal: Journal of Forest Science Pages: 1-8 Volume: 66 Issue: 1 Year: 2020 DOI: 10.17221/84/2019-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/84/2019-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202001-0001.txt Handle: RePEc:caa:jnljfs:v:66:y:2020:i:1:id:84-2019-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Martin Baláš Author-Name: Josef Gallo Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Ivan Kuneš Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Work sampling and work process optimization in sonic and electrical resistance tree tomography Abstract: Using non-destructive techniques in investigating tree stem rots is a modern approach in arboriculture and urban forestry. We used PiCUS® 3 Sonic tomograph (SoT) and TreeTronic® electrical resistance tomograph (ERT) to inspect the health status of urban and park trees. The process of setting up the device and measuring is time demanding as it requires numerous delicate operations. The aim of the study was to evaluate the time needed for measurement and to propose an optimal workflow. The results of work sampling suggest that scanning of one average-difficulty tree by SoT and ERT resistance tomography takes an average approximately 52 min (when one operator measures one scan), and approx. 37 min (when two operators measure a queue of trees). Working in two-person-team is moderately more efficient. Typically, the overall costs of one scan are approximately EUR 25-30 (~ CZK 650-780), depending on many variables. Keywords: arboriculture, job sequencing, PiCUS tree tomography, tree risk management, trunk decay, urban forestry Journal: Journal of Forest Science Pages: 9-21 Volume: 66 Issue: 1 Year: 2020 DOI: 10.17221/66/2019-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/66/2019-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202001-0002.txt Handle: RePEc:caa:jnljfs:v:66:y:2020:i:1:id:66-2019-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Josef Gallo Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Lukáš Bílek Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Václav Šimůnek Author-Workplace-Name: Department of Silviculture, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Sonia Roig Author-Workplace-Name: Department of Natural Systems and Resources, Universidad Politécnica de Madrid, Madrid, Spain Author-Name: J. A. Bravo Fernández Author-Workplace-Name: Department of Natural Systems and Resources, Universidad Politécnica de Madrid, Madrid, Spain Title: Uneven-aged silviculture of Scots pine in Bohemia and Central Spain: comparison study of stand reaction to transition and long-term selection management Abstract: The achievement of sustainable forest management requires the incorporation of ongoing environmental changes into long-term planning. Moreover, in time of climatic change and changing company demands, importance of Scots pine (Pinus sylvestris L.) is still increasing at the expense of other tree species due to its low ecological requirements. The aim of the study was to compare the structure and production of Scots pine stands managed under different silvicultural systems on four research plots, assess the structural and diversity indices, and analyse the increment structure using tree-ring dating in the Czech Republic and Spain. Area of study was Western Bohemian and Guadarrama Mountain range in Central Spain. The results indicate that stand volume on the investigated plots ranged from 231 to 441 m3∙ha-1 with tree density 276-996 trees∙ha-1. Intensively managed (uneven-aged) permanent research plots showed increased growth on basal area. The difference was evident also for older trees. The transition to uneven-aged forest does not negatively influence stocking and wood production and provide higher benefits for diversity and structural complexity in comparison to regular stands. Keywords: Pinus sylvestris L., close-to-nature silviculture, uneven-aged stands, forest structure, tree-ring dating Journal: Journal of Forest Science Pages: 22-35 Volume: 66 Issue: 1 Year: 2020 DOI: 10.17221/147/2019-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/147/2019-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202001-0003.txt Handle: RePEc:caa:jnljfs:v:66:y:2020:i:1:id:147-2019-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Ondřej Špulák Author-Name: Dušan Kacálek Author-Workplace-Name: Forestry and Game Management Research Institute at Strnady, Opočno Research Station, Opočno, Czech Republic Title: Spontaneous development of early successional vegetation improves Norway spruce forest soil after clear-cutting and renewal failure: a case study at a sandy-soil site Abstract: Clear-cutting is the most common silvicultural system. Sometimes, if the new crop is not established successfully, clearcut is left unreforested. This study focused on a site where early successional species such as silver birch (Bi) and rowan (Ro) were accompanied with Norway spruce (Sp) in 13-year-old stand from natural regeneration at 550 m of altitude at an acidic site with eastern aspect and 25% slope. We found five types of stand composition: treeless gaps, Ro-Bi, Ro-Bi-Sp, Bi-Sp and monospecific Sp. Besides these juvenile ones, adjacent 100-year-old spruce (Sp old) stand representing pre-harvesting conditions was studied. In addition to the performance of trees, organic layer (Hum), topsoil (Ah) and upper subsoil (B) horizons were sampled to study an expected shift of chemical properties after clear-cutting and secondary succession at the site of interest. Birch dominated the natural regeneration; rowan and spruce were present mostly in understorey. Old spruce was more acidic and nutrient-poorer compared to the juvenile treatments. The treeless treatment showed also slightly higher pH and comparable nutrients compared to the young mixtures. Young spruce was higher in nitrogen compared to Ro-Bi-Sp mixture. Keywords: clear-cutting, succession, tree performance, soil properties Journal: Journal of Forest Science Pages: 36-47 Volume: 66 Issue: 1 Year: 2020 DOI: 10.17221/150/2019-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/150/2019-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202001-0004.txt Handle: RePEc:caa:jnljfs:v:66:y:2020:i:1:id:150-2019-JFS