Journal of Forest Science, 2003 (vol. 49), issue 2
Thinning experiments in Norway spruce stands after 40 years of investigation - 1st series
M. Slodičák, J. Novák
J. For. Sci., 2003, 49(2):45-73 | DOI: 10.17221/4681-JFS 
Forestry and Game Management Research Institute at Jíloviště-Strnady has created a new experimental base for thinning research since 1956. A total of 46 experimental series were founded in Norway spruce (Picea abies [L.] Karst.); 24 series are still maintained. This paper focuses on the series established in young Norway spruce stands in 1958 (Rumburk, Mostek, Vimperk I, Vimperk II and Nisa). The goal of thinning experiment was to compare two basic methods of thinning: positive selection from above (2a) and negative selection from below (3b or 5b). Each experimental series has a control plot (1c) where no thinning was conducted. The effect...
Czech forest ecosystem classification
J. Viewegh, A. Kusbach, M. Mikeska
J. For. Sci., 2003, 49(2):74-82 | DOI: 10.17221/4682-JFS
Forest classification, made up by Plíva and Průša (Plíva 1971), has been used in the Czech Republic forestry since 1970. This classification is based on ecological factors of the environment. Edaphic conditions are at the first position, then climatic conditions follow (by their vertical [altitudinal] distribution mainly). These two factors form the basic construction called ecological grid (Table 1).
The influence of particle composition in a three-layer particleboard on its physical and mechanical properties
J. Hrázský, P. Král
J. For. Sci., 2003, 49(2):83-93 | DOI: 10.17221/4683-JFS
The paper deals with results of research aimed at the problem of the maximum possible amount of added sawdust to standard particles into surface and central layers of three-layer particleboards in order that the physical and mechanical properties of particleboards will comply with the CSN 49 2614 Standard. Waste from wood processing is widely used for the production of particleboards. For that purpose, three-layer particleboards with computed density of 740 kg/m3 at seven versions A-G with 0-30% sawdust addition to standard particles were manufactured in a laboratory. Five particleboards 500 × 500 × 16 mm were made for each version. These air-conditioned...