Current issue: 56(2)

Under compilation: 56(3)

Scopus CiteScore 2021: 2.8
Scopus ranking of open access forestry journals: 8th
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Silva Fennica 1926-1997
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1980-1989
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1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles containing the keyword 'forest growth'

Category: Article

article id 4737, category Article
S. A. Wilde. (1967). Production of energy material by forest stands as related to supply of soil water. Silva Fennica vol. 1 no. 1 article id 4737. https://doi.org/10.14214/sf.a14447
Keywords: biomass; forest growth; soil water; supply of transpiration water; red pine; Pinus resinosa
Abstract | View details | Full text in PDF | Author Info

This study estimates the supply of soil water required for the annual and total production of energy material by the biomass of 32-year-old plantation of red pine, Pinus resinosa Ait. in Wisconsin, the United States.

The supply of transpiration water was determined as the sum of summer precipitation, winter stored water, and condensed vapor, minus gravitational discharge and evaporation of intercepted rainfall. On the average, the 1,20 m root zone of coarse sandy soils of central Wisconsin receives 2,750 M.T. of water per hectare. During the 32nd year of plantation growth, the increment biomass, including 43% of merchantable timber, was 10,100 kg/ha, or 162 x 105 kcal/g. At this time of the culminating growth, the production of 1 kg of wood material consumed 272 kg of water. The corresponding transpiration coefficient 0,37% is near the maximum for the ecosystem of hard pines – sandy soils of glacial outwash with field capacity between 7 and 9%. On the weight basis, the annual leaf fall constituted 32% of the biomass and over 80% of merchantable timber.

The entire supply of water of 96,000 M.T./ha produces in 32 years 211,112 kg of total dry matter at a rate of 1 kg of wood per 455 kg of water, with corresponding transpiration coefficient of 0,22%. The evapogravitational losses during the early stages of the stand’s growth decreased the water utilization efficiency of trees about 40%.

The information obtained permitted to outline several hydrological relationships pertinent to forest culture, namely: maximum rate of forest growth as delineated by the supply of available transpiration water; content of available moisture in soils of high tension capacity; contribution to soil water rendered by natural subirrigation and condensation of athmospehric vapor; growth depressing effect of weeds.

The PDF includes a summary in Finnish.

  • Wilde, E-mail: sw@mm.unknown (email)
article id 4551, category Article
Yrjö Ilvessalo. (1939). Metsikön kasvun arvioiminen. Silva Fennica vol. no. 52 article id 4551. https://doi.org/10.14214/sf.a13958
English title: Assessment of forest growth.
Original keywords: metsäopetus; metsänhoitajien jatkokurssit; jatkokoulutus; kasvutaulukot; metsänarvionti; kasvu
English keywords: forest growth; forest mensuration; forest education; growth and yield tables; professional development courses; increment
Abstract | View details | Full text in PDF | Author Info

Silva Fennica issue 52 includes presentations held in professional development courses, arranged for foresters working in public administration in 1938. The presentations focus on practical issues in forest management and administration, especially in regional level. The education was arranged by Forest Service.

This presentation describes different methods of assessing tree growth.

  • Ilvessalo, E-mail: yi@mm.unknown (email)

Category: Article

article id 7245, category Article
Erik Lönnroth. (1929). Theoretical observations on volume growth and drain of a forest stand. Silva Fennica vol. 34 no. 32 article id 7245. https://doi.org/10.14214/aff.7245
Keywords: volume; forest growth; stand; natural drain
Abstract | View details | Full text in PDF | Author Info

In a natural state growing closed forest the amount of timber grows yearly. However, in the same time the timber volume also decreases when part of the trees die in the competition for light and other growth factors.

There are many interactive functions and characteristic that influence the growth and drain in a stand. These can be illustrated as mathematical models. The article discusses a set of models.

The volume 34 of Acta Forestalia Fennica is a jubileum publication of professor Aimo Kaarlo Cajander.

  • Lönnroth, E-mail: el@mm.unknown (email)
article id 7077, category Article
Aimo Kaarlo Cajander. (1923). On the relation between forest growth and timber consumption in Finland. Silva Fennica vol. 25 no. 2 article id 7077. https://doi.org/10.14214/aff.7077
Keywords: forest growth; presentation; speech; timber consumption
Abstract | View details | Full text in PDF | Author Info

The article is a presentation given by the author on occasion of visit from Austrian timber industry and foresters (August 17th 1923), and again for the German visitors (August 20th 1923) in Punkaharju, Finland. The speech deals with the question of the overuse of Finnish forest compared to their growth. The developments of slash-and-burn-culture and forest inventories are described. The results of the inventories show, though still in preliminary state, that there is no nationwide overuse in total, though there are some locations where the felling are bigger than growth. 

  • Cajander, E-mail: ac@mm.unknown (email)

Category: Research article

article id 510, category Research article
Helge Dzierzon, Risto Sievänen, Winfried Kurth, Jari Perttunen, Branislav Sloboda. (2003). Enhanced possibilities for analyzing tree structure as provided by an interface between different modelling systems. Silva Fennica vol. 37 no. 1 article id 510. https://doi.org/10.14214/sf.510
Keywords: tree growth; mathematical models; simulation systems; forest growth; analysis tools
Abstract | View details | Full text in PDF | Author Info
In recent years, many different advanced mathematical models and simulation systems for tree and forest growth have been developed. We show a possibility to extend analysis tools for measured and simulated plants using a data interface between the simulation model LIGNUM and the multifunctional software system GROGRA. Both systems were developed by different teams. To demonstrate the enhanced possibilities for analyzing a LIGNUM tree, several examples are given. In these examples three different approaches for analysis are applied to measured and simulated trees: Fractal dimension, deduction of tapering laws, and water potential patterns obtained from simulation of waterflow by the specialized software HYDRA. Conclusions for the interfacing and comparison of different modelling tools are drawn.
  • Dzierzon, Institut für Forstliche Biometrie und Informatik, Universität Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany E-mail: hdzierz@gwdg.de (email)
  • Sievänen, The Finnish Forest Research Institute, Vantaa Research Centre, P.O. Box 18, FIN-01301 Vantaa, Finland E-mail: rs@nn.fi
  • Kurth, Institut für Informatik, Brandenburgische Technische Universität Cottbus, P.O. Box 101344, D-03013 Cottbus, Germany E-mail: wk@nn.de
  • Perttunen, The Finnish Forest Research Institute, Vantaa Research Centre, P.O. Box 18, FIN-01301 Vantaa, Finland E-mail: jp@nn.fi
  • Sloboda, Institut für Forstliche Biometrie und Informatik, Universität Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany E-mail: bs@nn.de

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