Journal of Forest Science, 2013 (vol. 59), issue 2
Forest fires and their causes in the Czech Republic (1992-2004)Original Paper
E. Kula, Z. Jankovská
J. For. Sci., 2013, 59(2):41-53 | DOI: 10.17221/36/2012-JFS 
Forest fires under conditions of the Czech Republic are evaluated from the aspect of their frequency of occurrence in 1992-2004 at a level of particular years, seasons, days and daytime, and causes of their origin. They are confronted with a situation in the CR in 1974-1983. Effects of climatic conditions are a limiting factor not only for the frequency of their origin but also for the size of the burnt area. Spring (April) and summer (August) culminations were balanced. The burnt area of the best part of forest fires (88.9%) was < 1 ha. The increased frequency of forest fires was noted in afternoon hours and during weekends. Areas threatened by...
Methods of digital photogrammetry in forest management in SlovakiaOriginal Paper
M. Kardoš
J. For. Sci., 2013, 59(2):54-63 | DOI: 10.17221/35/2012-JFS
The practical aspect of utilization of digital photogrammetry methods and their products in Slovak forestry is presented. We deal with the comparison of various data obtained by digital cameras, their accuracy, utilization and effectiveness for mapping. Based on presented results we summarize the main conclusions in the field of forest mapping. We also deal with the process of pan-sharpening for the preparation of image data for the interpretation and classification of forestry features. Also, the statistical characteristics of two photogrammetric projects with different geometric resolution photos (Ultracam D digital camera with ground sample distance...
Recent results of Czech-American fir hybridization researchOriginal Paper
J. Kobliha, J. Stejskal, P. Škorpík, J. Frampton
J. For. Sci., 2013, 59(2):64-71 | DOI: 10.17221/55/2012-JFS
Fraser fir (Abies fraseri) Christmas tree plantations in North Carolina are infested by root rot caused by Phytophthora cinnamomi. This disease kills almost 100% of Fraser fir material and leaves the soil permanently infested. Control crossings of Mediterranean fir hybrids Abies cilicica × Abies cephalonica with Abies fraseri were performed to ensure possibly resistant hybrid material of desired Christmas tree parameters. Pollen of various clones of A. fraseri was shipped to the Czech Republic by NCSU. Control pollinations were performed in April/May 2010 and 2011 in our hybridization seed orchards....
Evaluation of deposition fluxes in two mountain Norway spruce stands with different densities using the extended Canopy Budget ModelOriginal Paper
I. Drápelová
J. For. Sci., 2013, 59(2):72-86 | DOI: 10.17221/39/2012-JFS
The field study in a mountain forest at Bílý Kříž provides a comparison of element fluxes for two adjacent forest spruce stands of the same age (29 years in 2005) but with different stem densities. During five years (2001-2005), bulk and throughfall precipitation was sampled and analysed. Total deposition, dry deposition and canopy exchange fluxes were evaluated on the basis of the Canopy Budget Model. Highly significant differences in base cations, dissolved organic carbon, SO42-, F-, and Cl- throughfall concentrations were found between the sparser and denser spruce stands. Throughfall, dry deposition...
GIS modelling for locating the risk zone of soil erosion in a deciduous forestOriginal Paper
M. Nasiri
J. For. Sci., 2013, 59(2):87-91 | DOI: 10.17221/71/2012-JFS
The maps of altitude, geology, vegetation cover and land use were prepared and classified as the main criteria to locate soil and water conservation programs. Analytical Hierarchy Process (AHP) was used to determine the relative priorities of these criteria by pairwise comparison. All the thematic maps were then integrated using the overlay process in Geographical Information System (GIS) and the final map of soil erosion risk was produced. Results indicated that vegetation cover was given the highest weight (0.494). The geology was assigned the second highest weight (0.313), as the main cause of initiation of the erosion of erodible lands. Land-use...