Current issue: 54(4)

Under compilation: 54(5)

Impact factor 1.683
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Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles containing the keyword 'haketus'.

Category: Article

article id 4991, category Article
Pertti Harstela, Leo Tervo. (1978). Taimikkopuun korjuumenetelmien vertailua. Silva Fennica vol. 12 no. 2 article id 4991. https://doi.org/10.14214/sf.a14845
English title: Comparison of methods for harvesting in sapling stand.

A theoretical nomogram was made for estimating the costs of fully mechanized thinning and the driving speed of the machine. Based on this nomogram and the previous studies three harvesting methods were compared; systematic fully mechanized harvesting, selective fully mechanized harvesting, and manual felling combined with whole-tree chipping.

The third method was cheaper than the fully mechanized methods in a pole-stage stand. The choice of the most advantageous chipping station depended on conditions, but the smaller tree size and possibly the reduced damage on the remaining stand favour chipping on the strip road rather than chipping on the intermediate landing or at the mill.

Mechanized systematic thinning was the cheapest method for harvesting in the sapling stand. The required driving speed were so low that ergonomic factors should not hinder its use. Factors related to the future production of the stand do, however, limit its use. Mechanized selective thinning does not seem to be an economic method for harvesting in a sapling or pole-stage stand.

The PDF includes a summary in English.

  • Harstela, ORCID ID:E-mail:
  • Tervo, ORCID ID:E-mail:
article id 4948, category Article
Matti Kärkkäinen. (1976). Puun ja kuoren tiheys ja kosteus sekä kuoren osuus koivun, kuusen ja männyn oksissa. Silva Fennica vol. 10 no. 3 article id 4948. https://doi.org/10.14214/sf.a14794
English title: Density and moisture content of wood and bark, and bark percentage in the branches of birch, Norway spruce and Scots pine.

In the study the proportion of branch samples of various diameter were studied. The branches were taken from small trees to be harvested by total tree chipping method. The material consisted of 1,056 branch samples of birch (Betula verrucosa, now B. pendula Roth, and Betula pubescens Erhr.), Norway spruce (Picea abies (L.) H. Karst.) and Scots pine (Pinus sylvestris L.) at intervals of 20 cm along each branch.

With exception of the basic density of bark, there was a relation between all the other properties which were studied and the diameter. Even when the effect of diameter was eliminated, in many cases the effect of the distance of the samples from the stem became apparent.

The PDF includes a summary in English.

  • Kärkkäinen, ORCID ID:E-mail:

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