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The efficiency of wood transport depends not only on the maximum load capacity, but also on the duration of individual transport operations. The purpose of the presented research is to analyze the duration of transport stages of Scots pine large−size wood (saw logs) and indicate the factors that affect the structure of the duration of the entire operation. The operation was divided in to truck driving...
The State Forests National Forest Holding (PGL LP) run business on the basis of financial independence, i.e. it covers the costs of this activity from its own revenues. In 2015, 92% of the revenues of forest districts came from the timber sale. Periods of slump in the timber market may threaten the financial stability of PGL LP, which is why one must seek and use additional revenues not related to...
ASF has existed in Poland since 2014. The main vector of this disease is wild boar (Sus scrofa). Traditional baiting site is one of the most popular elements of wildlife infrastructure for wild boars hunting. Along with the development of ASF in Poland, the bait became an object of attention due to the high probability of contact between healthy and sick animals, and thus as a place of potential spread...
The wild boar is an omnivorous animal that disturbs the top soil layer by foraging (rooting). In some regions of Europe seasonal fluctuations in rooting have been observed. Wild boars not only eat plants, but also strongly modify their habitat. In the Białowieża Forest wild boar most frequently visit oak−hornbeam forests growing on fertile soil. On sites where the forest floor is covered with dense...
The aim of the study is to analyze changes in the species composition and in the diameter structure of the main forest−building species in the Roztocze National Park (central−eastern Poland). The research was carried out on 315 permanent monitoring plots. The range of collected data included: type of protection (strict and active protection), forest site type, tree species and their dbh (>7 cm...
The purpose of this study was to present possibilities of using available Volunteered Geographic Information (VGI) created by users of Flickr to monitor activity in the forest areas within the Warsaw agglomeration. The paper indicates which forest complexes (municipal or agglomeration) were most frequently visited as well as the dates of the greatest use of forest areas in daily, weekly and monthly...
The supply of raw material is the result of the logistical link between the actions of forest and wood companies. Research on sustainable development for this area of activity results from cooperation between representatives of forests, transport companies and wood industry companies. The rationale for the undertaken projects is determined by the level of interference of transport activities and taking...
Forest management is carried out based on the economic calculation, taking into account the principles of forest sustainability and protection. For a short period, an attempt to predict the unit’s economic situation on the basis of the analysis of the time series with a trend can be made. Appropriate exponential equalization methods were selected. When forecasting fixed costs in the new economic period,...
The use of forwarders during forest work enabled a significant increase in the efficiency of timber transport from the harvesting site to the place of temporary storage. Due to their efficiency and greater safety compared to older types of machines, a further increase in the use of these machines in Polish forests seems inevitable. The research was carried out in the Gidle Forest District (southern...
The aim of the presented research was to characterize the driving related to the deliveries of large−size Scots pine wood and to determine the factors affecting its structure and distance. Operation was divided in to: driving for load on a public and forest road, forest ride between loading points, as well as driving with saw logs on a forest and public road. Data on the distance traveled on forest...
Parasites are the most common cause of disease in European roe deer (Capreolus capreolus), but prevalence of some invasions was smaller after a dry and hot summer. In the years 2015−2016, which were distinguished by exceptionally high temperature during summer months, the presence of nematodes and protozoa was assessed in the digestive tract of roe deer in western Poland. Studies confirmed that weather...
The qualitative and quantitative descriptive models of tree architecture differ in the degree of complexity and the way of mapping tree structure, and thus, are of varied use in forestry. The qualitative, Hallé−Oldeman models, serve as a framework for analyzing tree architecture and help define the different components of a tree branching system. Among the quantitative models (here: horizontal, three−dimensional...
Bilberry, the most commonly collected fruit of Polish forests, has not only culinary values, but also proven therapeutic and preventive effects. It is a valuable forest raw material for herbal, pharmaceutical and food companies producing dietary supplements and drugs. The range of applications for bilberry is very wide, and the most important feature of this raw material is the high antioxidant potential...
The aim of the study was to determine the influence of stand density index on the tree−ring width, latewood proportion and wood density for Norway spruce. Study sites were located as follows: 12 within the north−eastern species range in Poland, 7 in the south−western range, in the Sudety Mts., and 9 in the Carpathians (southern range). Clustering stands according to their stand density index, 10 data...
The paper analyzes the spatial and temporal diversity of afforestation of non−forest land, with particular emphasis on land not being the property of the State Treasury, before joining the European Union and as part of subsequent stages of the Rural Development Program. Data from the databases of the Statistics Poland and from the Agency for Restructuring and Modernisation of Agriculture was used...
The paper presents the standardization of felling and production of assortments costs by the method of grouping forest districts with similar natural conditions. The standard costs were compared with the incurred (actual) and planned costs, and the method of determining the standard unit costs of felling and production of assortments was assessed in terms of its use in the State Forests National Forest...
The aim of the study was to assess the trophism of soils in the strict nature protection area using the soil trophic index (SIG). The ‘Rybitew’ strict protection area (224.2 ha, created in 1965), is located in the north−eastern part of the Kampinos National Park (central Poland). The results of field and laboratory studies of the physicochemical and chemical properties of soils made it possible to...
Ecological indicator values (EIV) are a commonly used tool for assessing habitat conditions in various ecosystems. They are relatively rarely used for the analysis of epiphytic communities, which results from objective difficulties in the study of this group of organisms in full height gradient on settled trees. Windthrows provide a rare opportunity to fully analyse the biota diversity of epiphytic...
The aim of the study was to compare the content of some chemical substances in a bark of about 3−year−old fast−growing poplars Populus deltoides × maximowiczii and Populus trichocarpa with literature data on the chemical composition of a bark of older deciduous trees. The Populus deltoides × maximowiczii and Populus trichocarpa material were obtained from the Wolica experimental field belonging to...
The aim of the paper was to determine the variability of selected macrostructural features and wood density for northern red oak growing in south−eastern Poland. On 4 study plots, we sampled each tree, taking an increment core from the northern side of the trunk, from the height of 1.3 m. The number of tree rings, width and the share of sapwood was measured. The cores were scanned and then tree ring...
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