Journal of Forest Science, 2003 (vol. 49), issue 1
Needle traces as indicators of growing conditions in Scots pine (Pinus sylvestris L.)
B. Konôpka
J. For. Sci., 2003, 49(1):1-10 | DOI: 10.17221/4669-JFS 
Needle retention (number of needle sets) and needle density (number of needle pairs per centimeter of shoot) were surveyed on Scots pines in five forest regions of Slovakia. The Needle Trace Method (NTM) was used to determine needle retention and needle density along the main stem retrospectively for the last four decades. In all forest regions, the values of these indicators varied from year to year. However, in Záhorská lowland, Vtáčnik, Krupinská plain, and High Tatras, the trends of both observed indicators were constant over the time series. The situation was different in the Levočské hills, where the needle retention displayed a decreasing trend...
Development of necrotic disease and health condition of trees of selective quality in a systematically tended beech pole-stage stand
A. Cicák, I. Mihál, I. Štefančík
J. For. Sci., 2003, 49(1):11-18 | DOI: 10.17221/4671-JFS
We compare the results of observations of bark necrotic disease and defoliation of beech assimilatory organs carried out in 1996 and 2000. A systematically managed, 53-year old beech pole-stage stand in Central Slovakia was chosen as an object of our research. It was found that necrotic disease had an increasing trend. The degree of necrotic disease indicated on trees of selective quality that are the main focus of interest of silvicultural managers was lower than the degree of necrotic disease on the other trees in the same stand layer (trees of unselective quality). The defoliation of assimilatory organs was not influenced by an increasing trend...
Altitudinal gradients of natural abundance of stable isotopes of nitrogen and carbon in the needles and soil of a pine forest in Nepal
S.P. Sah, R. Brumme
J. For. Sci., 2003, 49(1):19-26 | DOI: 10.17221/4673-JFS
This paper deals with natural abundance of 15N and 13C in the soil and needles of the pine forest (Pinus roxburghii, Sargent) along an altitudinal gradient. The study area lies in the elevation range of 1,200 m to 2,200 m in Kathmanduvalley of Nepal. The higher altitude soil was found to be much more depleted of 13C than the lower altitude soil. The decreasing trend of C-isotope (as well as the trend of N-isotope) might be attributed to the lower mineralisation rate and net nitrification rate at the higher altitude. The observed differences in isotopic N- and C-contents of needles and soils across altitudinal...
Economic analysis of forest joint-stock companies in the Czech Republic in 1992-2000
V. Kupčák
J. For. Sci., 2003, 49(1):27-36 | DOI: 10.17221/4675-JFS
The basic principle of the economic reform of state forests of the CzechRepublic after 1990 was to separate management in forests from the implementation of production activities. A state enterprise Forests of the Czech Republic with its headquarters in Hradec Králové was charged to manage state forests. From the former 7 enterprises of state forests 78 joint-stock companies have been established that carry out silvicultural and logging activities in state forests and in forests of other owners under the conditions of competition environment and on the basis of contracts. The paper deals with the exact evaluation of partial and present results of...
Quantitative and qualitative damage caused by mammals and birds to the planting and natural seeding
M. Saniga
J. For. Sci., 2003, 49(1):37-43 | DOI: 10.17221/4676-JFS
In the years 1999-2000, I studied damage to transplants in the planting and wildlings in the natural seeding at the locality Zamrlô in the Starohorské vrchy Mts. (750-1,000 m a.s.l., NE exposure, forest type Abieto-Fagetum). Damage to the woody plants by the mammals and birds in the planting was much higher (14%) than in the natural seeding (7%). All woody plant species were also more damaged in the planting (spruce 16%, larch 9%, fir 24%, beech 10%, and sycamore 10%) than in the natural seeding (spruce 7%, larch 6%, fir 10%, beech 7%, and sycamore 9%). There were found 8 mammals that damaged woody plants both in the planting and natural seeding...