Template-Type: ReDIF-Article 1.0 Author-Name: Samuel Fekiač Author-Workplace-Name: Department of Forest Economics and Policy, Faculty of Forestry, Technical University in Zvolen, Zvolen, Slovak Republic Author-Name: Iveta Hajdúchová Author-Workplace-Name: Department of Forest Economics and Policy, Faculty of Forestry, Technical University in Zvolen, Zvolen, Slovak Republic Author-Name: Roman Dudík Author-Workplace-Name: Department of Forestry and Wood Economics, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Kim Hortenská Author-Workplace-Name: Department of Forestry and Wood Economics, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Martin Halász Author-Workplace-Name: Department of Economics, Management and Business, Faculty of Wood Sciences and Technology, Technical University in Zvolen, Zvolen, Slovak Republic Title: Proposal of a conceptual framework for creating a model for the implementation of green growth indicators in the conditions of the Slovak Republic Abstract: Green growth promotes sustainable economic development by protecting the environment and efficiently using natural resources. Supporting green growth enhances long-term sustainability, quality of life, and climate change mitigation. This article aims to propose a conceptual framework for implementing green growth indicators in Slovakia by comparing their perception with that of the Czech Republic. A questionnaire survey was conducted among 3 281 Slovak and Czech forestry enterprises [Nomenclature of Economic Activities (NACE) classification 02.10], with 1 365 responses. The findings highlight significant differences in the approach to green growth indicators between small and large enterprises and between state and non-state enterprises. Additionally, the study examines how Slovakia and the Czech Republic manage these indicators, forming the basis for a conceptual framework for their implementation in Slovakia. The research contributes to the discourse on green growth and sustainability, key concepts in the 21st century. Keywords: bioeconomy, circular economy, eco-efficiency, green transition, sustainability Journal: Journal of Forest Science Pages: 373-383 Volume: 71 Issue: 8 Year: 2025 DOI: 10.17221/22/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/22/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202508-0001.txt Handle: RePEc:caa:jnljfs:v:71:y:2025:i:8:id:22-2025-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Tamás Ábri Author-Workplace-Name: Department of Plantation Forestry, Forest Research Institute, University of Sopron, Püspökladány, Hungary Author-Name: Zsolt Keserű Author-Workplace-Name: Department of Plantation Forestry, Forest Research Institute, University of Sopron, Püspökladány, Hungary Author-Name: Veronika Honfy Author-Workplace-Name: Department of Plantation Forestry, Forest Research Institute, University of Sopron, Püspökladány, Hungary Author-Name: Károly Rédei Author-Workplace-Name: Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary Title: Diameter growth performance of northern red oak (Quercus rubra L.) in northeastern Hungary Abstract: Northern red oak (Quercus rubra L.) is an important introduced tree species in Hungary, particularly in the Nyírség region. This study investigates its diameter growth (DBH) in six forest subcompartments, with stand ages ranging from 20 to 71 years. 5- and 25-year diameter increments were calculated. The distribution of diameter and diameter increment values was also determined. The results show significant growth across all sites. For example, quadratic mean diameter (QMD) increased from 16.4 cm to 30.4 cm over 25 years in the forest subcompartment Encsencs 12A, and from 20.3 cm to 38.4 cm in Ófehértó 2A. Five-year DBH increments ranged from 1.8 cm (± 0.8) in older stands to 4.2 cm (± 0.5) in younger or middle-aged stands. The findings confirm Q. rubra's capacity for steady diameter growth in northeastern Hungary and contribute valuable growth data for future yield modelling and forest management strategies. Keywords: increment, introduced tree species, plantation forestry, tree diameter, yield modelling Journal: Journal of Forest Science Pages: 384-392 Volume: 71 Issue: 8 Year: 2025 DOI: 10.17221/39/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/39/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202508-0002.txt Handle: RePEc:caa:jnljfs:v:71:y:2025:i:8:id:39-2025-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Luis Walther Espinoza-Ambicho Author-Workplace-Name: Department of Forest Sciences, Professional School of Forest Engineering, Faculty of Renewable Natural Resources, National Agrarian University of the Jungle, Huánuco, Peru Author-Name: Luis Alberto Valdivia-Espinoza Author-Workplace-Name: Department of Renewable Natural Resources Sciences, Faculty of Renewable Natural Resources, National Agrarian University of the Jungle, Huánuco, Peru Author-Name: Warren Ríos-García Author-Workplace-Name: Department of Renewable Natural Resources Sciences, Faculty of Renewable Natural Resources, National Agrarian University of the Jungle, Huánuco, Peru Author-Name: Martin Valtera Author-Workplace-Name: Department of Forest Botany, Dendrology and Geobiocoenology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Author-Name: Luis Alberto Valdivia-Ruiz Author-Workplace-Name: Civil Engineering Program, Faculty of Science and Engineering, Pontifical Catholic University of Peru, Lima, Peru Author-Name: Tito Felipe González-Manrique de Lara Author-Workplace-Name: Department of Humanities, Faculty of Economic and Administrative Sciences, National Agrarian University of the Jungle, Huánuco, Peru Author-Name: Lenka Ehrenbergerová Author-Workplace-Name: Department of Forest Botany, Dendrology and Geobiocoenology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic Title: Tree growth and soil recovery in Amazonian lands degraded by coca cultivation and grazing Abstract: Soil degradation resulting from illicit coca cultivation and unsustainable grazing practices poses a major challenge to ecosystem restoration in the Peruvian Amazon. This study evaluates the potential of fast-growing tree species to rehabilitate degraded soils while producing economically valuable timber. Monoculture plantations of Corymbia torelliana (eucalyptus), Calycophyllum spruceanum (capirona), Colubrina glandulosa (shaina), and Cedrelinga cateniformis (tornillo) were established on former coca and pasture lands in the Alto Huallaga Valley. We assessed tree growth and key soil physicochemical properties - including soil organic matter (SOM), bulk density (BD), pH, extractable phosphorus (P), and cation exchange capacity (CEC) - in topsoil (0-10 cm) and subsoil (10-40 cm) layers. Eucalyptus and tornillo showed the highest diameter growth, while tornillo plots had significantly higher SOM levels. Soil pH was strongly acidic across all plots, and subsoil P was lowest under tornillo. CEC was highest in eucalyptus and capirona plots. Our findings suggest that tree plantations, particularly with eucalyptus, capirona, and tornillo, represent a viable strategy for the sustainable use and rehabilitation of soils formerly used for coca cultivation and grazing. Keywords: Amazon, degraded soils, fast-growing trees, Peru, reforestation, soil quality Journal: Journal of Forest Science Pages: 393-405 Volume: 71 Issue: 8 Year: 2025 DOI: 10.17221/47/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/47/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202508-0003.txt Handle: RePEc:caa:jnljfs:v:71:y:2025:i:8:id:47-2025-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Mochammad Taufiqurrachman Author-Workplace-Name: Department of Forest Products, Faculty of Forestry and Environment, IPB University, Bogor, Indonesia Author-Name: Utami Dyah Syafitri Author-Workplace-Name: Department of Statistics, Faculty of Mathematics and Natural Sciences, IPB University, Bogor, Indonesia Author-Name: Goh Mia Chun Author-Workplace-Name: CSK Landscape Services, Singapore Author-Name: Lina Karlinasari Author-Workplace-Name: Department of Forest Products, Faculty of Forestry and Environment, IPB University, Bogor, Indonesia Title: Assessing the accuracy of a root detector in mapping radial tree root distribution Abstract: A root detector is a non-destructive technology developed to indicate the radial distribution of tree roots, which are not often visible on the surface. This study aims to assess the accuracy of the root detector in estimating the radial distribution of both exposed and buried tree roots. Six Agathis loranthifolia Salisb. trees were selected, three with exposed roots and three with buried roots. The Fakopp® root detector, an acoustic-based tool, was used in this study. Root estimation was based on a combination of threshold values (> 400 m.s-1), average values, and the peak of the sound wave velocity. Soil excavation was manually conducted at a depth of 30 cm within a 100 cm radius of the tree trunk. The results showed that under similar soil conditions, the root detector achieved an accuracy of over 80% in detecting the actual radial root distribution, as validated by the excavation method. Root diameter exhibited the strongest correlation with sound velocity in detecting lateral roots. However, root depth and inclination angle contributed to detection inaccuracies in estimating the radial distribution of lateral roots. Keywords: excavation method, lateral root, non-destructive method, sound velocity, validating Journal: Journal of Forest Science Pages: 406-415 Volume: 71 Issue: 8 Year: 2025 DOI: 10.17221/27/2025-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/27/2025-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202508-0004.txt Handle: RePEc:caa:jnljfs:v:71:y:2025:i:8:id:27-2025-JFS