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The study attempts to assess the strategic position of the forest service sector companies based on the SWOT method. Positioning of the company development was done on the example of 49 companies, which are providing services for the forest management in Poznań, Piła and Szczecin Regional State Forest Directorates (western Poland). Data that enabled the analysis was obtained by the usage of the questionnaire...
The paper presents the analysis of the macro− and microelements content in the leaves, stems and roots of Vaccinium myrtillus and Vaccinium vitis−idaea as well as in the surface genetic horizons of the soils of the Słowiński National Park (SNP). The cumulative properties and translocation coefficients were characterized as well as translocation coefficients of nutritional components in bilberry sprouts...
The aim of this paper was to determine the dry mass content in the fresh mass of leaves, trunks or branches and in the total woody aboveground biomass of shrubs forming the undergrowth of the stands in the Niepołomice Forest (southern Poland). The variability of the dry mass content in the analysed components was determined. For the prevailing species also its correlation with the individual's height...
Improvement cuttings conducted simultaneously on a few closely located areas, often face problems about how to prepare places that would serve as temporary landings for the harvested wood. This results from insufficient wood storing space in the forest and limited accessibility of the road network to wood hauling trucks, and leads to solutions, suggesting where small landings at tree−stand edge must...
The study assessed the intensity of Polish konik browsing in mixed coniferous forest (BM), alder swamp forest (OL) and pine swamp forest (BB) of different canopy closure and shrub or ground vegetation cover. The study was conducted in Polish konik enclosure situated in the Roztoczański National Park (eastern Poland) in August 2011. We examined mean browsing intensity and the tendency of horses to...
The aim of this study was to identify the motives of visits in the Wigierski National Park (north−eastern Poland), which were focused on health and regeneration of vitality by inhabitants of Suwałki. Knowledge about the influence of forest environment on health was also investigated. The quota sampling was used to determine the sample size and number of respondents was determined proportionally to...
As the access to the fossil fuels is limited, renewable energy sources have been especially intensively promoted in recent years, namely biomass. A comparatively large amount of biomass can be obtained from forests. This refers to round wood characterized by low technical quality, small−sized wood, and logging residues. Under Polish conditions, the potential amount of logging residues is estimated...
The objective of the study was to determine the size of interest in spending leisure time in forests among the residents of the Podkarpackie Province (south−eastern Poland) and to examine recreational potential of Rzeszów suburban forests. At first, basing on surveys, the demand for leisure in forests among the adult residents of the Podkarpackie Province was assessed. The survey was conducted on...
Development of innovative solutions in forestry requires also that students of forestry would understand in greater extend the complex system of changes in the environment and the way the man controls these changes. It is also another challenge (innovation?) for the forest education at all levels. At the level of university education, forestry in the first half of the XXI century needs to find appropriate...
The aim of the study was to compare growth and survival of plug and bare−root seedlings planted at different dates. The experiment was established in 2003 in the Oleśnica Forest District (south−western Poland). Seedlings were planted at four dates: the end of August, September and October 2003 and the beginning of April 2004. The two−factorial experiment comprised eight treatments. It was established...
Modelling is one of the basic activities in the field of biological sciences. The main purpose of modelling is to illustrate relationships and phenomena of biological objects (and traits describing them) and present reality as close as it is possible with expected range of error. In the paper we presented results of approximation of the selected theoretical distributions, i.e. singular (normal, log−normal,...
The objective of the study was to present the social and economic conditions needed for provision of public forest functions by the State Forests National Forest Holding (PGL LP) managing the great majority of forests of the national property in Poland. The analysis was restricted to the selected protection functions (water and soil protection, protection of air and wildlife) and to the social functions...
The presented research aimed to assess the influence of illegal dumping sites on changes in the phosphorus, nickel and lead content and the phosphatases activity in 0−20 cm top soil−layer. The samples were taken in the Bydgoska Forest (northern Poland) from four points. At plots W1 (debris and ceramic waste, glass, plastics, metals, textiles and used electrotechnical equipment), W2 (electrotechnical...
The paper presents the result of the studies on the properties of soil organic matter in Sapric Histosols associated with mid−forest spring niches in the valley of the Kamienna Creek, left bank tributary of the Słupia River (northern Poland). We sampled five soil profiles at the depth of every 10 cm until the mineral bed was reached. We analyzed degree of peat mass decomposition, reaction and the...
The paper aimed at comparison of remotely sensed data for forest areas in Poland. The main objective was to study how time−series of satellite data derived from NOAA AVHRR and SPOT VEGETATION (SPOT VGT) are compatible and can be useful for forest cover monitoring. NOAA AVHRR fifteen−year observations collected by the receiving station mounted at the Institute of Geodesy and Cartography were processed...
The size−class growth model is an empirical model applicable for the prediction of the dynamics of natural forest growth. It is based on the following assumptions: (1) changes in the forest condition are determined on the basis of the sum of the changes that take place in individual size classes, (2) the trees in a given class are represented by single average tree, (3) the calculation of the future...
The paper presents a method of Landsat 5 Thematic Mapper satellite image processing to assess the condition of forests in the Tatra National Park (southern Poland). Selected images were acquired on 1987/09/01, 2005/09/02 and 2011/09/03 from the same sensor with maximum time interval for the first and last scene and from similar phenological period. Firstly, the data were radiometrically corrected...
There is a lack of an acceptable and practical method for calculating the optimal moment at which a forest stand is considered ready for felling. The aim of the research was to: (1) develop a concept for the calculation of the rotation age for forest stands based on economic criteria and (2) develop a methodology for obtaining and processing empirical data necessary for such calculation. It is assumed...
The aim of this work was to assess the rate of the changes in roundwood export and import in selected countries of the European Union during the period of 2003−2012. The data published in the FAO statistical yearbooks and concerning exported and imported timber amounts and values in the majority of the EU member states was analyzed. Based on the study, it can be concluded that international trade...
The article assesses the influence of method of revitalisation of the forest fire site in Potrzebowice Forest District (western Poland) on basic parameters of the microbial activity in soils. We investigated study plots established in 1994, two years after the forest had burnt down completely. We applied three different methods of soil preparation and planted either Scots pines (Pinus sylvestris L...
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