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1

Valuation of pine logs into flitch elements processing

100%
Janiszkiewicz J., Szczawinski M., Biernacka J.
Intercathedra
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2011
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tom 27
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nr 2
The valuation of the pine logs into flitch elements processing was made on the basis of the method of calculation established by Szczawiński [Szczawiński, 2005]. This paper serves as an example of a practical implementation of a method of the valuation which was used in the timber factory PPD POLTAREX Sawmill in Nowa Wieś and which is based on the actual figures obtained in a test sawmill process conducted on 16 November 2010. The test results prove the usefulness of the proposed method of valuation. It turns out that the highest profitability rate is achieved by using proper method of woodworking of the lower quality of timber.
2

Valuation of experimental sawing of low-grade pine logs (WCO)

100%
Szczawinski M., Biernacka J.
Intercathedra
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2010
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tom 26
Valuation of the WCO pine logs were made using data from the article by professor W Dzbenski and K. Laskowski [Dzbenski, Laskowski, 2005]. Authors study assumed on single sawing logs after logs bucking. Technical and economic values from the journal “Rynek Drzewny” and the data from the experimental sawing made possible valuation of 1m3 of logs. Calculations showed the usefulness of the proposed valuation formula. The formula showed unsatisfactory profitability of low-quality round wood manufacturing process for standard timber in the second half of 2009, ie in a bad stage of the cycle of market economy on a global scale.
3
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Value of merchantable timber in Scots pine stands of different densities

100%
Bembenek M., Karaszewski Z., Kondracki K., Lacka A., Mederski P. S., Skorupski M., Strzelinski P., Sulkowski S., Wegiel A.
Drewno. Prace Naukowe. Doniesienia. Komunikaty
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2014
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tom 57
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nr 192
Differences in the intensity of silvicultural treatments, as well as natural tree mort-ality, insect damage and fungal disease can eventually lead to variable stand density even on sites of the same quality. In addition, the bigger the initial stand density,the smaller the crown and trunk volume of single trees. The objective of theresearch was a detailed analysis of the impact of stand density on the total stand volume and value of merchantable timber. The area studied was in Drawno ForestDistrict, north-west Poland, on sites with sandy soil conditions typical for Scots pine (Pinus sylvestris L.). The total volume of merchantable roundwood wasmeasured on 20 sample plots (each covering an area of 0.5 ha) of which 19 were in 82-year-old stands and one in an 87-year-old stand. The stands were divided into three stand density groups (SDG), where the average number of trees growing per group was as follows: 547 (SDG I), 651 (SDG II) and 765 (SDG III). The volume ofa single tree was calculated using diameter (DBH) and height measurement. A qualityclassification of all 6432 tree stems was carried out in accordance with the Polish Standard. Statistical analysis did not indicate that density influenced the total timber volume of the stands studied, which was recorded as an average of 323 m3∙ha-1. However,statistically significant differences in the value of merchantable timber were observed:the highest value of 100 m3 of merchantable timber was recorded in SDG I (€ 5118.87), 6 and 12% higher than in SDGs II and III (€ 4842.09 and € 4565.80, respectively).The results obtained suggest that in the final phase (the last two age classes), pine stands growing in Polish conditions should be maintained at a lower stand density.
4

The dependency of the quality and size structure and of the value of timber on the origin and age of stands

100%
Barszcz A.
Electronic Journal of Polish Agricultural Universities. Series: Forestry
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2004
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tom 07
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nr 2
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