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3 Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

3 2018

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Occurrence of metal elements in cut -to-length pine timber

100%

Płońska-Kaczor K. , Szaban J. , Kowalkowski W. , Karaszewski Z.

2018

tom No. 104

234--238

The request of the timber market for good wood quality and requires an examination of metal elements in timber. The quality of contaminated wood is inconsistent with the contract and makes this product less valuable. Both, sellers and buyers want to reduce or to eliminate the problem. The publication compares the percentage content of metal elements in cut-to-length pine timber, which comes from selected Forest Districts belonging to three Regional Directorates of the State Forests. The wood was delivered in two successive years. The aim was also to find the causes of the presence of metal elements in the wood, especially in the Forest Districts, where the percentage was higher than in the other ones.

Changes in volume and share of quality grades in large-sized timber depending on cut to length long timber variants

88%

Szaban J. , Płóciennik M. , Płońska-Kaczor K. , Kowalkowski W. , Karaszewski Z.

2018

tom No. 104

85--90

The aim of this study is to determine changes in volume and share of quality grades in pine timber depending on the adopted cut to length variant. For the purpose of this study one plot was selected, on which final cutting was performed. The plot was located in the Lipka Forest District, the Białobłocie Forest Division, in compartment 98a. The experimental site was covered by a pine stand aged 110 years. It was decided for this analysis to select trees meeting the dimension and quality requirements for grades A, B and C. The whole stem was measured and the long timber was cut into logs of 4 m, 5 m and 6 m in length. Next using calipers the smallest diameter under bark was determined for each log. These measurements made it possible to establish the volume and quality and dimension grades of the whole stem as well as those of logs, into which it was cut to length. Analyses showed that the volume of that timber assortment changes at cut to length logging of pine long timber. In the case of 4m logs the volume increases, while for 5m and 6m logs it decreases. It was also observed that after cutting to length of logs from long timber the share of higher grades decreases considerably to the advantage of lower grades.

Change in value of large-sized timber depending on long timber cutting to length

88%

Szaban J. , Płóciennik M. , Płońska-Kaczor K. , Kowalkowski W. , Karaszewski Z.

2018

tom No. 104

70--74

The aim of this paper is to determine the change in value of pine timber depending on the type of cutting to length. For the purpose of this study one plot was selected, on which final cutting was performed. The plot was located in the Lipka Forest District, the Białobłocie Forest Division, in compartment 98a. The experimental site was covered by a pine stand aged 110 years. It was decided for this analysis to select trees meeting dimension and quality requirements for grades A, B and C. The whole stem was measured and the long timber was cut into logs of 4 m, 5 m and 6 m in length. Next using calipers the smallest diameter under bark was determined for each log. These measurements made it possible to establish the value of the whole stem as well as the value of logs, into which it was cut to length. These analyses showed that at cutting of pine long timber into logs their value changes. The value of timber decreased in each adopted timber cutting variant to produce logs. It was finally stated that from the financial point of view cutting of timber to length into logs is not profitable to the seller.