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Axial variation in modulus of elasticity (MOE) in wood of Scots pine (Pinus sylvestris L.) growing in stands particularly exposed to wind

100%
Jelonek T., Tomczak A., Pazdrowski W.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2013
|
tom 83
2

Evaluation of age structure of mature forest stands

100%
Marusak R.
Roczniki Akademii Rolniczej w Poznaniu. Leśnictwo
|
2001
|
tom 39
3

Preliminary technical time standards for harvesters working in premature and mature stands

84%
Dvorak I., Karnet P.
Electronic Journal of Polish Agricultural Universities. Series: Forestry
|
2007
|
tom 10
|
nr 1
4

Tree damage in harvesting and skidding wood in mature beech stands

84%
Holota R.
Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa
|
2005
|
tom 91
167-172
5

Changes of the valuation features of mature pine stands in the Experimental Forests District Zielonka in the period from 1963 to 2004

84%
Mis R., Chirrek M.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
|
2007
|
tom 06
|
nr 4
The primary objective of the research project was to determine the variability of the taxation characters of pine stands during individual cycles of forest management work in the period extending from 1963 to 2004. The authors assessed changes in the forest species composition which took place in the Zielonka Experimental Forest District, especially, the proportion of Scots pine. It is evident from the performed analyses that the share of pine in the discussed object decreased during the examined period of time by nearly 7% and, in 2004, it reached the level of 82.7%. The oak increased its share from 5.1% of the forest area in 1963 to 12.3% in 2004. The obtained results corroborate a systematic increase of the stand current increment and volume. Changes in the proportion of forest sites (19% in 1963 and 78% in 2004) indicate that there is a need for the modification in the ways of forest management, especially in the case of pine stands which are artificial and unsuitable for the site.
6

Adaptation of European beech [Fagus sylvatica L.] to different ecological conditions: leaf size variation

84%
Barna M.
Polish Journal of Ecology
|
2004
|
tom 52
|
nr 1
This paper focuses on the issue related to the response of beech leaves to the opening of stand canopy resulting from a shelterwood cut of various intensity. Four research plots each with a different stand density provided different conditions for the development of foliage. The research was conducted on dominant, codominant and subdominant sample trees representing the mean stand diameter of all plots. The data were compared for the upper, middle and lower layer of tree crowns (each equals to one third of crown length). As for dominant and codominant trees, mean leaf area showed a tendency to increase towards the lower crown layer. As for subdominant trees, relation between the location of leaves in the crown and leaf area was similar to dominant and codominant trees but this trend was observed only on the plot most open. Only in the case of codominant trees the leaf area was decreasing with a decreasing stand density. Greater stand opening results in a proportionally smaller leaf area. Growing conditions for subdominant tree leaves were completely different when compared to conditions for upper tree classes. On the plots with harvest cutting we observed that a decreasing stand density resulted in a general increase of leaf size. The only exception to the rule was the control plot where the parameters recorded were higher and inconsistent with the above described trend.
7

Biomechanics of Scots pine (Pinus sylvestris L.) coming from mature stands

59%
Jelonek T., Jakubowski M., Remlein A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2012
|
tom 78
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