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+ 2008 + 2009 + 2010 + 2011 + 2012 + 2013 + 2014 + 2015 + 2016 + 2017 + 2018 + 2019 + 2020 + 2021 + 2022 + 2023 1-2/2024 3-4/2024 5-6/2024 7-8/2024 9-10/2024 11-12/2024 + 2025 new HR EN |
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| RIJEČ UREDNIŠTVA | ||
| Uredništvo HŠD | 117 | |
| What does Croatian Forestry Society expect from the future government? |  
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| IZVORNI ZNANSTVENI ČLANCI | ||
| Kristijan Cokoski, Dejan Beuković, Miroslava Polovinski-Horvatović, Vladimir Maletić, Marko Vukadinović, Elizabeta Dimitrieska-Stojković, V. Enimiteva | https://doi.org/10.31298/sl.148.3-4.1 |
121 |
| The levels of mercury (Hg) and arsenic (As) in wild boar’s liver (Sus scrofa) in eleven hunting areas from the Republic of North Macedonia |
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| Summary The monitors have recently been defined as the organisms in which changes in known characteristics can be measured to assess the extent of the environmental contamination. Among the numerous game species, the wild boar as omnivore is characterized as an exceptionally good biomonitor. The concentrations of one heavy metal (Hg) and one metalloid (As) were measured using cold vapor atomic absorption spectrometer and atomic absorption spectrophotometry in the liver tissue of free-living wild boars. From 11 hunting areas locations that cover the whole territory of North Macedonia in a period of 7 years (2016-2022) a total of 608 wild boar liver samples were harvested during the regular hunting season. The mean concentration of Hg from 11 hunting grounds ranged from 12.7 µg/kg to 68.8 µg/kg, and mean concentration for all was 45.67 µg/kg. The average concentration of As ranged from 22 µg/kg to 55.3 µg/kg, and mean concentration for all was 33.1 µg/kg. For mercury, 6.56% or 40 of the total number of samples (608) exceeded the maximum allowed limits, and for arsenic none of the examined samples exceeded the allowed limit. For both elements a statistically significant difference was determined in relation to the years, with irregular oscillations from year to year. The mean values for mercury and arsenic are encouraging and generally indicate the relatively low contamination in the territory of the Republic of North Macedonia. However, the statistical differences due to the year as a factor suggest there is the need for the further research. Keywords: Wild boar,Mercury (Hg),Arsenic (As),Hunting areas,Liver |
authors: Kristijan Cokoski Dejan Beuković Miroslava Polovinski-Horvatović Vladimir Maletić Marko Vukadinović Elizabeta Dimitrieska-Stojković Vangelica Enimiteva | |
| Damir Drvodelić, Milan Oršanić, Ela Španjol, Marko Vuković, Tomislav Jemrić | https://doi.org/10.31298/sl.148.3-4.2 |
131 |
| Fruit and seed morphological traits and duration effect of sulfuric acid seed scarification on some Crataegus Tourn. ex L. species |
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| Summary Hawthorn species (Crataegus Tourn. ex L.) are widely known for their medical, ecological, and economic benefits. The main issue of this study was to define the morphological characteristics of fruits and seeds as well as the impact of sulfuric acid (96% concentration) scarification with different time duration on seeds of three different hawthorn species (C. crus-galli, C. monogyna, C. laevigata). Statically significant differences were reported for all measured fruit and seed morphological traits. Highest fruit weight, length and width was recorded for C. crus-galli, while lowest for C. monogyna. Different sulfuric acid (96% concentration) scarification treatments were used for C. cruss-galli (150 and 210 min), C. laevigata, and C. cruss-galli (45, 75 and 105 min) seeds. Only significant differences were found in contrast to the control. Thickness of the tiniest part of the seed coat was significantly reduced in C. crus-gallic and C. laevigata scarified seeds in contrast to control. Thickness of the thickest part of the seed coat was significantly reduced only in C. crus-galli seeds scarified for 210 min in contrast to control. Therefore, optimal duration of scarification treatment for C. crus-galli seeds should be 210 min. The results obtained in this study will contribute to a better knowledge of morphometric characteristics and the pre-sowing treatment of seeds of some Crataegus species which can be utilized in nursery production. Keywords: scarification, double dormancy of seeds,seeds,Crataegus monogyna,Crataegus monogyna,Crataegus laevigata,Crataegus laevigata,Crataegus crus-galli,Crataegus crus-galli |
authors: DRVODELIĆ, Damir ŠL ORŠANIĆ, Milan ŠL Ela Španjol Marko Vuković Tomislav Jemrić | |
| Ylmaz Türk, Harun Canyurt | https://doi.org/10.31298/sl.148.3-4.3 |
139 |
| Capabilities of using UAVs to determine forest road excavation volumes in mountainous areas |
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| Summary Decision support systems based on spatial data are widely used in some countries for planning production activitiesin forestry and designing forest roads. In recent years, Unmanned Aerial Vehicles (UAVs) have been playingan active role in the production of high resolution and accurate digital elevation models (DEMs) of forested areas.In the preparation of progress payments for forest road construction works, the workload is high, while the feethat has to be paid to the contractor company after the completion of the road construction is determined accordingto the final cost in the progress payment schedules. In this study, the applicability of UAV technology for determiningforest road cut volume and land classification was investigated. A 640-meter section of the forest roadcoded 001 of Taşliyayla Forest Management Sub-Directorate (Bolu/Türkiye) was examined in the study. Flightswith an UAV (drone) were carried out in autonomous mode before and after the construction of the road examinedin the study. In addition, in order to determine the amount of cut, measurements of the geometric characteristicsof the road were made in the field after the road construction. As a result of the study, 2189 m3 cut volumewas found with the UAV data with an average error of 3 cm. According to the field measurement results, theamount of cut was determined as 2080 m3. A difference of +5% was found between the UAV data and the fieldmeasurement results. In addition, using the JavaScript coding language on the Google Earth Engine platform, soil(46%) and loose soil (54%) land classification was identified from the orthophoto images. The obtained resultsreveal the usability of UAVs in determining forest road volumes. Keywords: UAVs,cut volume,forest roads,digital elevation model,Türkiye |
authors: Yilmaz Türk Harun Canyurt | |
| Cansu Öztürk, Servet Caliskan | https://doi.org/10.31298/sl.148.3-4.4 |
153 |
| Influence of desiccation sensitivity and critical moisture content on Quercus cerris, Quercus petraea and Quercus robur acorns |
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| Summary In this study, critical moisture contents and desiccation sensitivity of Quercus cerris (Turkey oak), Quercus petraea (Sessile oak), Quercus robur (Pedunculate oak) seeds were determined to see how desiccation affects acorn moisture content and germination behaviour. The moisture content of the harvested acorns was found to be 41% for Q. cerris, 46% for Q. petraea and 45% for Q. robur. The acorns were separated into sublots, sprayed with distilled water to reach their maximum moisture content and then left to dry for 18 days. There were statistically significant differences in germination as a function of desiccation time and decreasing moisture content. Initial germination was delayed. The highest moisture contents were 48% for Q. cerris, 51% for Q. petraea and 49% for Q. robur acorns. The highest water uptake was 17% in Q. cerris, 11% in Q. petraea and the lowest was 9% in Q. robur. The moisture content with a germination percentage below 50% was considered as the critical moisture content. In a period of 12-15 days after the beginning of the drying process, the acorns reached the critical moisture content. The germination percentage decreased from 83% to 43% for Q. cerris, from 100% to 44% for Q. petraea and from 97% to 43% for Q. robur as the moisture content decreased from the maximum to the critical moisture content. For Q. cerris, Q. petraea and Q. robur, the critical moisture contents at which acorns begin to lose viability were between 28-31%, 31-36% and 32-37%, respectively. The results of the present study provide guidance for nursery practices carried out on oak species, from acorn harvesting to seeding and post-seeding care. Keywords: germination,oak,pedunculate oak,recalcitrant seed,sessile oak,Turkey oak |
authors: Cansu Öztürk Servet Caliskan | |
| PRETHODNO PRIOPĆENJE | ||
| Kyriaki Kitikidou, Elias Milios | https://doi.org/10.31298/sl.148.3-4.5 |
163 |
| LineFit.xls: a Microsoft Excel template for fitting 11 regression models to Y-X data |
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| Summary An essential challenge in any environmental field (forestry, agriculture, etc.), which places an emphasis on data analysis for the purpose of decision making and problem solving, is the estimation of a dependent environmental variable (Y) through an independent one (X). In this work, a Microsoft Excel template is proposed for assessing a set of eleven popular regression Y-X models. Any researcher can use LineFit.xls as a modeling tool for assessing these eleven regression models and selecting the one that best fits their data by running tests on all regression assumptions and comparing models using the most common fitting comparison criteria. Microsoft Excel, being a widely used and user-friendly program, makes it easy to update, expand, and personalize the tests to meet specific needs. Keywords: data fitting,data modeling,fit comparasion, MS Office software |
authors: Kyriaki Kitikidou Elias Milios | |
| PREGLEDNI ČLANCI | ||
| Krunoslav Teslak, Martina Teslak, Milan Vrbanus | https://doi.org/10.31298/sl.148.3-4.6 |
171 |
| 220th birth anniversary of Antun Tomić, a true intellectual and the great mind of forestry science |
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| Summary The foundations of modern forest science and practice in Croatia (revival period) were laid during the 19th century. In a relatively short time during the second half of the 19th century, the Croatian-Slavonic Forestry Society was founded (1846), the Forestry Journal was launched (1877), the Economic Forestry School in Križevci was established (1860), the Forestry Act was adopted for the whole Austro- Hungarian Monarchy (1852), the "Act on Property Municipalities in the Croatian and Slavonic Military Krajina" was implemented (1873) and the work of the Forestry Academy at the University of Zagreb began (1898). The period was also marked by the appearance of many professionally educated forestry experts who received higher education in forestry schools in Croatia (Križevci) or other European centres. Among others, Antun (Ante) Tomić, born in 1803 in Vinkovci, played an outstanding role. His activities marked all the listed events, important for Croatian forestry in the 19th century. Although about Ante Tomić work it has been written before (e.g. Nenadić, Kerstenčanek, Piškorić and others), the 220th anniversary of his birth is a good incentive to refresh the memory of Tomić contribution to the forestry profession and to the Croatian homeland. Accordingly, the aim of this paper is to present Tomić activities in the context of contemporary challenges of forestry science and profession. Antun Tomić completed a three-year education at the Mariabrunn (Vienna) Forestry College in 1824, and after his internship, he held the responsible functions as the Imperial-Royal Chief Forester in a number of regiments of the Military Frontier. At the same time, he engaged in scientific work and presented a series of reflections on normal growing stock, forest development, forest management models and ensuring the sustainability of forests. He is the author of the organizational reforms in the forestry of the Military Frontier ("Instructions for the demarcation of estate-community forests in the Krajina" from 1871), the founder and the first president of the Croatian Forestry Society, and an excellent forestry scientist who translated his extensive work experience into applicable scientific works from almost all forestry disciplines. The common feature in all his works is the forests conservation and the establishment of normality, and through normality reaching sustainable management. At the same time, Tomić keen sense for close-to-nature forestry is manifested in the search for a more precise spatial stratification of forests, more precise forest growth measurement, more flexible definition of allowed harvest volume, greater investment in the conservation and care of forests (especially in disturbed (e.g. karst) habitats). All those ideas, aimed at ensuring the sustainable management of Croatian forests, Tomić framed in his rational method of forest management, which was a very advanced combined method that takes the actual condition and possibilities of forests into account. Antun Tomić views on forestry are the foundations of the modern Croatian forestry profession, and the aspiration to establish the spatiotemporal and structural normality of forests. Therefore, the sustainability of forest management stays a permanent challenge and goal. Keywords: Antun Tomić,Croatian Forestry Society,Estate Community,Military Frontier,forestry scientist,history of forestry |
authors: TESLAK, Krunoslav ŠL Martina Teslak Milan Vrbanus | |