Current issue: 53(3)

Under compilation: 53(4)

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Silva Fennica 1926-1997
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Articles by Markku Mäkelä

Category: Article

article id 4974, category Article
Markku Mäkelä. (1977). Teknisesti korjattavissa oleva hakkuutähde sekä kanto- ja juuripuu Kaakkois-Suomessa. Silva Fennica vol. 11 no. 3 article id 4974. https://doi.org/10.14214/sf.a14825
English title: The amounts of logging residues and stump and root wood technically harvestable in southeast Finland.

The amounts of harvestable logging residues and stump and root wood were examined in the area where 100,000 solid m3 of stemwood was cut in 1975. The cutting amounts of stemwood from work sites suitable for harvesting of logging residues was 35,000 m3, and suitable for harvesting of stump and root wood 38,000 m3. The increase in the yield of wood (without bark) from logging residues compared with the unbarked stemwood was 2.4%. The same percentage of wood from stump and root wood was 5.0–5.8% depending on the harvesting loss.

The PDF includes a summary in Finnish.

  • Mäkelä, ORCID ID:E-mail:
article id 4970, category Article
Markku Mäkelä. (1977). Metsähakkeen tiheyden laskeminen. Silva Fennica vol. 11 no. 2 article id 4970. https://doi.org/10.14214/sf.a14821
English title: Calculating the basic density of whole tree- and logging residue chips.

A method is presented in this study for calculating the basic density of whole tree- and logging residue chips and the results of trial measurements on some commonly used chip sorts. The basic density of Scots pine whole tree chips was found to be 1–18 kg/m3 smaller than that of pine pulpwood of the same age. The basic density of Norway spruce whole tree chips was 4–22 kg/m3 greater than that of similar aged pulpwood. The basic density of birch whole tree chips was 4–16 kg/m3 and grey alder whole tree chips 7–24 kg/m3 greater than pulpwood of the same age. The basic density of conifer logging residue chips was considerably greater than that of pine and spruce whole tree ships.

The PDF includes a summary in English.

  • Mäkelä, ORCID ID:E-mail:
article id 4966, category Article
Markku Mäkelä. (1977). Seulontatuloksia Algol-monikäyttöhakkurin hakkeesta. Silva Fennica vol. 11 no. 2 article id 4966. https://doi.org/10.14214/sf.a14817
English title: Screening results on the chips made by Algol-multipurpose chipper.
Original keywords: hake; hakkurit; hakkeen laatu

The first part of this paper consists of a study based on the available literature concerning the analysis of chip quality in the sulphate pulp process and the factors having an effect on chip quality. Using the empirical material, the suitability of the Williams chip classifier in evaluating the quality of chips made by the Algol chipper is first studied. The distribution of length and thickness of pulpwood-, long logs-, whole tree-, and logging residue chips in different conditions determined by screening is then presented.

The PDF includes a summary in English.

  • Mäkelä, ORCID ID:E-mail:

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