Long-term effect of wetland drainage on the productivity of Scots pine stands in Poland

2012 ◽  
Vol 274 ◽  
pp. 172-180 ◽  
Author(s):  
Jarosław Socha
Keyword(s):  
Scots Pine ◽  
Term Effect ◽  
Wetland Drainage ◽  
Long Term Effect ◽  
Pine Stands ◽  
Scots Pine Stands

scholarly journals The influence of different thinning methods on dominance coefficients of future crop trees in even-aged Scots pine stands

2014 ◽  
Vol 75 (1) ◽  
pp. 31-45
Author(s):  
Tadeusz Zachara
Keyword(s):  
Scots Pine ◽  
Average Diameter ◽  
Long Term Effect ◽  
Pine Stands ◽  
The Difference ◽  
1960S And 1970S ◽  
Poor Site ◽  
Thinning Effect ◽  
Scots Pine Stands

Abstract The research aim was to evaluate the influence of different thinning methods on future crop tree growth. Investigations were conducted on permanent Scots-pine experimental plots, established in 1960s and 1970s in Kozienice, Łąck, Parciaki and Janów Lubelski Forest Districts. To assess the response to thinning of future crop trees, their dominance coefficients were used. These are defined as quotients for each given future crop tree diameter and average stand diameter (WP1), the average dominant layer diameter (WP2) and the average diameter of 100 thickest trees per hectare (WP3). The difference between each coefficient value at the beginning and at the end of the measurement period was used as a measure of the thinning effect. On Kozienice, Łąck and Parciaki plots the differences between treatments were significant, especially in the period after first thinning. The increase of WP3 coefficient occurred in a case of strong thinning - TS1 and TS2. On plot Parciaki also the moderate thinning TU1 and TU2 had a significant influence on change of this coefficient. On plot Janów Lubelski the influence of treatment has not been stated in the first 5-year period but in the next one. Analyses of changes in the dominance coefficients confirmed the hypothesis that the WP3 coefficient is very useful as it is the most stable indicator of future crop-tree position in a stand. On Kozienice, Łąck and Parciaki plots the significant differences between treatments were stated, especially in the period after first thinning. The influence of thinning treatment on the plot Janów Lubelski was not considered for the first 5-year period but in the next one. All reactions to thinning were slower on this plot, possibly because of the relatively poor site conditions. This was a long-term effect. The results obtained suggest that very intense thinning of Scots pine stands should only be implemented under a restricted set of conditions - in healthy, not neglected, forest stands. Classical moderately-selective thinning is preferable to intense thinning and is the most convenient option for pine stands

scholarly journals Long-term effect of whole tree biomass harvesting on ground cover vegetation in a dry Scots pine stand

Silva Fennica ◽  
2016 ◽  
Vol 50 (5) ◽  
Author(s):  
Āris Jansons ◽  
Linda Robalte ◽  
Roberts Čakšs ◽  
Roberts Matisons
Keyword(s):  
Scots Pine ◽  
Ground Cover ◽  
Term Effect ◽  
Tree Biomass ◽  
Biomass Harvesting ◽  
Long Term Effect ◽  
Ground Cover Vegetation ◽  
Whole Tree

A long-term effect of subliminally presented words

2010 ◽  
Author(s):  
Andreas T. Breuer ◽  
Michael E. J. Masson ◽  
Glen E. Bodner
Keyword(s):  
Term Effect ◽  
Long Term Effect
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