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Paper compares various analysis methods suitable for an analysis of point pattern with directionally varying point density. As example was used point pattern from spacing experiment created according to Nelder design in which tree density changes greatly but in smooth manner. Such a pattern could be not analysed by methods assuming homogenous point density e.g. classical estimator of Ripley's K function...
The article presents the results of the research on the remuneration and promotion system in the State Forests in Poland. The research was conducted using a questionnaire survey and utilises answers from 414 managers of forest districts and 105 representatives of all regional directorates of the State Forests. The respondents critically evaluated the current remuneration system, especially in the...
Study determines the species composition and frequency of entomopathogenic fungi in the soil of Jata Nature Reserve (E Poland). Fungi were isolated from soil samples by 'insect bait method' with Galleria mellonella and Tenebrio molitor larvae. We found five species of entomopathogenic fungi: Beauveria bassiana, Isaria farinosa, I. fumosorosea, Metarhizium anisopliae and Lecanicillium lecanii. The...
Kozienice Forest (central Poland) belongs to very valuable areas from touristic and ecological point of view. Water resources are important factor of further development of this region. Analysis of 49−year (1963−2011) annual and seasonal rainfall and runoff characteristics from a small (82 km2) catchment of Zagożdżonka River, with forestation ratio of 0.40, indicated a statistically significant decrease...
Airborne laser scanning (ALS) technology allows collecting data describing top forest layer in a very accurate way. This provides a possibility to generate crown height models (CHM) with resolution in which single tree crowns can be detected. In presented study highly automatic algorithm for single tree detection is presented. FALCON II ALS acquired data in Forest Experimental Station in Rogów (central...
Study assessed the usefulness of various methods for choosing the initial values for the numerical procedures for estimating the parameters of mixture distributions and analysed variety of mixture models to approximate empirical diameter at breast height (dbh) distributions. Two−component mixtures of either the Weibull distribution or the gamma distribution were employed. The study plots, representing...
The paper presents preliminary results and experiences concerning promoting diverse structures in forest stands dominated by light demanding tree species, i.e. those that prevail under conditions of Polish lowlands. Data was collected in the ‘Control Unit Browsk 28C', established in 2002 in the managed part of the Biało− wieża Forest (eastern Poland) and surveyed again in 2011.
Polish constitution and other legal acts realize that state−own forests are the legacy of every citizen of Poland, and admission into it for recreation – including horse riding – is one of subjective rights, which should be effectively protected. Obviously the ‘theory of the owner’, where the foresters realizing in state−own forests only owner's privileges based on civil law, and both sides of that...
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