Current issue: 53(4)

Under compilation: 54(1)

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Silva Fennica 1926-1997
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Acta Forestalia Fennica
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1913-1932

Articles containing the keyword 'Entwässerung'.

Category: Article

article id 7132, category Article
Juhani Sarasto. (1961). Über die Klassifizierung der für Walderziehung entwässerten Moore. Acta Forestalia Fennica vol. 74 no. 5 article id 7132. https://doi.org/10.14214/aff.7132
English title: On classification of peatlands drained for forestry purposes.

The aim of the study is to find out 1) whether and how the original moor type can be found out based on vegetation regardless the phase of drainage; 2) whether the different phases of draining can be distinguished based on the vegetation; and 3) is it possible to classify the well drained moors into vegetation types that would reflect the productive capacity of the land.

The data consists of samples collected from ditched areas. There are 11 moor types from two climatic ditching zones. The results show that the original moor type can be determined based on vegetation, the phase of drainage can be determined under some limitations, and the classification for productivity can be done for practical purposes.    

The PDF contains a summary in Finnish. 

  • Sarasto, ORCID ID:E-mail:
article id 7242, category Article
P. Kokkonen. (1929). Beobachtungen über die Beziehungen zwischen der Grundwassertiefe und dem Waldwachstum auf einem kanalisierten Moore. Acta Forestalia Fennica vol. 34 no. 29 article id 7242. https://doi.org/10.14214/aff.7242
English title: Observations on the relationship between groundwater level and forest growth on a ditched peatland.
Original keywords: Grundwasser; Moor; Entwässerung
English keywords: ground water; peatland; drainage

The article presents the observations made on peatland “Savonneva” in summer 1929 in commune Pulkkila, north-west Finland. The study concentrates on the relationship between groundwater level and growth of trees. The areas was first ditched in 1894, when a main ditch and a side ditch were dug. The ditches were repaired several times, last time a year before the study took place.    

Parts of the area has been taken for agricultural purposes, and other areas have been naturally afforested. The size and abundance of trees varies strongly because the drainage of the area has been uneven. Closer to the main ditch the forest grows better than further away. There is a clear line between the afforested and open areas.

It seems that the tree growth decreases faster with certain groundwater levels than if the groundwater level is deeper.  

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

  • Kokkonen, ORCID ID:E-mail:
article id 7229, category Article
O. J. Lukkala. (1929). Über die Dicke der Torfschicht und die Neigungsverhältnisse der Mooroberfläche auf verschiedenen Moortypen. Acta Forestalia Fennica vol. 34 no. 16 article id 7229. https://doi.org/10.14214/aff.7229
English title: The thickness of peat bed and gradients of peatland surface on different peatland types.

The type of the peatland and its classification as forest site (height-over-age-classification) are important information when the drainage potential of a peatland is defined. The gradient and thickness of peat bed are also significant.

The observations for the study have been collected in state owned forests in middle-Finland. The thickness and gradient variations have no clear differences between different types of peatlands. The results show that from the view of drainage for afforestation, the peatlands that are good or suitable for afforestation are flatter and more even that those less suitable. The more suitable peatlands also have thinner peat bed and bigger gradient.

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

 

  • Lukkala, ORCID ID:E-mail:
article id 7045, category Article
O. J. Lukkala. (1920). Studien über das Verhältnis zwischen dem Moortypus und dem Oberflächentorf der Moore. Acta Forestalia Fennica vol. 16 no. 3 article id 7045. https://doi.org/10.14214/aff.7045
English title: Studies on the relationship between the type of the peatland and the peat of its surface.

The aim of the study is to find out how do the peatlands develop after drainage and how does the type of peat affect the growing conditions of the forest on it. Study is based on measurements made in summer 1919 in about middle Finland (districts of Loppi, Yläne, Kihniö, Nerkoo, Orivesi, Vilppula, Multia and Karstula). The macroscopic identified content of the peat was analyzed: the different peat types were categorized according the species of the most abundant plant remains. The characteristics of the studied peat types are represented.

The conclusion of the study is that when deciding about the suitability of the drained peatland for afforestation, the thickness and content of the peat must be considered in addition to peat type.   

  • Lukkala, ORCID ID:E-mail:

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