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Articles containing the keyword 'Scandinavia'

Category : Article

article id 5612, category Article
Gregory S. Amacher. (1997). The design of forest taxation: A synthesis with new directions. Silva Fennica vol. 31 no. 1 article id 5612. https://doi.org/10.14214/sf.a8513
Keywords: forest policy; North America; forest taxation; literature review; future research; Scandinavia
Abstract | View details | Full text in PDF | Author Info

In this paper, different approaches and results concerning forest tax design are reviewed. In particular, comparisons are made between Scandinavian approaches, which rely on the two-period model, and North American approaches, which largely rely on the Faustmann model. Existing work is critically evaluated according to several stylized facts that are common among forest taxation problems. These include the second-best forest policy environment, joint production of public and private forest goods, the dynamic nature of forest capital, public and private ownership, competition between forest and non-forest sectors, and global policy constraints on taxation design. The gaps in addressing stylized facts are used to motivate new research directions. Problems and appropriate public finance literature are identified for investigating forest tax policy under government budget constraints, fiscal federalism, dynamic forest tax design, open economy forest tax policy, and econometric studies of reform. One conclusion reached from discussing future research is that two period and dynamic models will continue to prove useful in analysing taxation design from the government's perspective.

  • Amacher, E-mail: ga@mm.unknown (email)
article id 4797, category Article
Lauri Heikinheimo. (1969). Pohjoismaiden yhteistyö metsäntutkimuksessa. Silva Fennica vol. 3 no. 2 article id 4797. https://doi.org/10.14214/sf.a14583
English title: Inter-Scandinavian research in forestry.
Original keywords: metsäntutkimus; pohjoismainen yhteistyö
English keywords: Nordiska skogsarbetsstudiernas råd; NSR; Scandinavian cooperation; Nordic cooperation
Abstract | View details | Full text in PDF | Author Info

Nordiska skogsarbetsstudiernas råd (NSR, Council for Inter-Scandinavian Research in Forest Work Science) is the most developed organization in this field. It has only research institute members. The council started in 1953 and has since then had meetings and working groups. Among the latter, an Inter-Scandinavian and British wood nomenclature was created. In 1969 the organization will start a number of joint investigations, two of them in Finland, concerning utilization of waste wood and transport difficulties in forest terrain. Sweden will study branching, Norway relations between men and machines and Denmark broadleaved tree cutting and hauling.

Economists have since 1958 had an Inter-Scandinavian Seminar for Forest Economists (Nordiskt skogsekonomiskt Seminar, NSS), which has only personal members. Also, Inter-Scandinavian forest congresses have been held every fourth year since 1923, in which also research results have been presented.

The PDF includes a summary in English.

  • Heikinheimo, E-mail: lh@mm.unknown (email)

Category : Article

article id 7124, category Article
Viljo Holopainen. (1960). Central marketing of cellulose, with particular reference to brand policy. Acta Forestalia Fennica vol. 73 no. 2 article id 7124. https://doi.org/10.14214/aff.7124
Keywords: Finland; Europe; export; marketing; pulp industry; cellulose; Scandinavia; sales of sellulose; joint selling
Abstract | View details | Full text in PDF | Author Info

Sales of cellulose have been handled in Finland since 1918 on a central marketing system through the Finnish Cellulose Union (Suomen Selluloosayhdistys), which is a joint sales company formed by the enterprises. First part of the paper constitutes the questions of the channels and functions of marketing. The most focal problem is related to the interests of individual producers. The second part concentrates on the brand policy of central marketing.

The small number of producer companies and – for 40 years ago – the existence of relatively few categories and grades on the market have contributed to the birth of central marketing of cellulose in Finland. Central marketing is probably more advantageous for smaller firms and companies less well placed than the biggest concerns. It levels out the status held by the best and the weakest firm in individual marketing and consequently perhaps does not give a top brand the standing it would have in relation to the other brands in individual marketing. Central marketing may have advantages also in regards of general price level and marketing costs.

The marketing system is dependent on the conditions in which it is to be carried out. An example of this is that Scandinavian cellulose producers have fairly good opportunities under the individual marketing system of using the service factor, owing to the good and far-ranging scheduled shipping facilities of the countries. It is probably the different conditions in this country that have made Finland’s cellulose marketing system essentially different from that of the Scandinavian countries.

The PDF includes a summary in Finnish.

  • Holopainen, E-mail: vh@mm.unknown (email)
article id 7103, category Article
J. P. Norrlin. (1923). Flora in area of Ääninen (Onega)-lake in Russian Karelia – Vegetation of Onega Karelia area and the natural historical border of Scandinavia and Finland in East. Acta Forestalia Fennica vol. 23 no. 4 article id 7103. https://doi.org/10.14214/aff.7103
Keywords: vegetation; flora; Scandinavia; natural historical; Onega; lake Ääninen; Karelia
Abstract | View details | Full text in PDF | Author Info

The article begins on the page 27/122 of the PDF file.

The first part of the text deals with a general presentation of the geographical, biological and cultural conditions of the studied areas. The second part presents the characteristics of vegetation classified according the forest types, with lists of species. Forested areas, open lands and swampy areas are dealt with separately. The Saoneshje peninsula is presented separately.

The third part of the text discusses the similarities of the natural conditions between studied area and respective part of Finland. The vegetation and amount of species is clearly more diverse in studied area than in parts of middle-Finland. The study shows that in respect to vegetation Onega-Karelia cannot be seen as a part of the same region than Finland.  

  • Norrlin, E-mail: jn@mm.unknown (email)
article id 7101, category Article
J. P. Norrlin. (1923). Lectio praecursoria (the opening presentation) of J. P. Norrlin at his public defence of a doctoral thesis on may 13th 1871. Acta Forestalia Fennica vol. 23 no. 2 article id 7101. https://doi.org/10.14214/aff.7101
Keywords: plant geography; Scandinavia; Norrlin; dissertation; biogeography
Abstract | View details | Full text in PDF | Author Info

The text is the opening presentation by the author at his public defence of his doctoral thesis on plant geography of Finland. The text discusses the principles that apply on plant geographical classification of earth with respect to characteristics of vegetation and gives an oversight on the plant geographical work conducted in Scandinavia. 

  • Norrlin, E-mail: jn@mm.unknown (email)
article id 7636, category Article
Kari Heliövaara, Rauno Väisänen. (1984). Effects of modern forestry on Northwestern European forest invertebrates: a synthesis. Acta Forestalia Fennica no. 189 article id 7636. https://doi.org/10.14214/aff.7636
Keywords: forest fires; forest management; insects; forestry; intensive silviculture; Scandinavia; forest invertebrates; primeval forests; changes in boreal forest dynamics
Abstract | View details | Full text in PDF | Author Info

The effects of modern forestry on northwest European forest invertebrates are summarized and analysed mainly on the basis of published literature. The direct influence of different practices including clear-cutting, thinning, burning-over, ploughing, changes in tree species composition of stands, fertilization, insecticides, pheromones and biological control are discussed from a forest zoological point of view. Also, the indirect effects of general changes in boreal forest dynamics, loss of primeval forests, cessation of natural fires and the dominance of young stands are described. The direct effects of different silvicultural practices on the species composition and diversity of forest invertebrates are usually considered to be striking but transient. However, when large areas are treated, the species associated with primeval forests, especially with the wood composition system in them, as well as the species associated with fires, seem to have drastically declined. In northwest Europe, efficient forestry has not caused such serious pest problems as is known from tropical countries or North America.

The PDF includes a summary in Finnish.

  • Heliövaara, E-mail: kh@mm.unknown (email)
  • Väisänen, E-mail: rv@mm.unknown

Category : Research article

article id 22007, category Research article
Ilkka Korpela, Antti Polvivaara, Saija Papunen, Laura Jaakkola, Noora Tienaho, Johannes Uotila, Tuomas Puputti, Aleksi Flyktman. (2023). Airborne dual-wavelength waveform LiDAR improves species classification accuracy of boreal broadleaved and coniferous trees. Silva Fennica vol. 56 no. 4 article id 22007. https://doi.org/10.14214/sf.22007
Keywords: crown modeling; laser scanning; photogrammetry; individual tree detection; Scandinavia
Highlights: First study to assess dual-wavelength waveform data in tree species identification; New findings regarding waveform features of previously unstudied species; Waveform features correlated with tree size displaying wavelength- and species-specific differences linked to bark reflectance, height growth rate and foliage density; Effects by pulse length and beam divergence are highlighted.
Abstract | Full text in HTML | Full text in PDF | Author Info
Tree species identification constitutes a bottleneck in remote sensing applications. Waveform LiDAR has been shown to offer potential over discrete-return observations, and we assessed if the combination of two-wavelength waveform data can lead to further improvements. A total of 2532 trees representing seven living and dead conifer and deciduous species classes found in Hyytiälä forests in southern Finland were included in the experiments. LiDAR data was acquired by two single-wavelength sensors. The 1064-nm and 1550-nm data were radiometrically corrected to enable range-normalization using the radar equation. Pulses were traced through the canopy, and by applying 3D crown models, the return waveforms were assigned to individual trees. Crown models and a terrain model enabled a further split of the waveforms to strata representing the crown, understory and ground segments. Different geometric and radiometric waveform attributes were extracted per return pulse and aggregated to tree-level mean and standard deviation features. We analyzed the effect of tree size on the features, the correlation between features and the between-species differences of the waveform features. Feature importance for species classification was derived using F-test and the Random Forest algorithm. Classification tests showed significant improvement in overall accuracy (74→83% with 7 classes, 88→91% with 4 classes) when the 1064-nm and 1550-nm features were merged. Most features were not invariant to tree size, and the dependencies differed between species and LiDAR wavelength. The differences were likely driven by factors such as bark reflectance, height growth induced structural changes near the treetop as well as foliage density in old trees.
  • Korpela, University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 University of Helsinki, Finland ORCID 0000-0002-1665-3984 E-mail: ilkka.korpela@helsinki.fi (email)
  • Polvivaara, University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 University of Helsinki, Finland E-mail:
  • Papunen, University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 University of Helsinki, Finland ORCID 0000-0001-5383-4314 E-mail: saija.papunen@outlook.com
  • Jaakkola, University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 University of Helsinki, Finland E-mail: laura.jaakkola@helsinki.fi
  • Tienaho, University of Eastern Finland, Faculty of Science and Forestry, P.O. Box 111, FI-80101 Joensuu, Finland ORCID 0000-0002-6574-5797 E-mail: noora.tienaho@uef.fi
  • Uotila, University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 University of Helsinki, Finland E-mail: johannes.uotila@helsinki.fi
  • Puputti, University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 University of Helsinki, Finland ORCID 0000-0003-1972-1636 E-mail: tuomas.puputti@helsinki.fi
  • Flyktman, University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 University of Helsinki, Finland ORCID 0000-0002-5235-317X E-mail: aleksi.flyktman@helsinki.fi

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