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Articles containing the keyword 'boniteetti'

Category : Article

article id 4891, category Article
Leo Heikurainen. (1973). Metsäojitustoiminta ja toimenpideraja. Silva Fennica vol. 7 no. 4 article id 4891. https://doi.org/10.14214/sf.a14729
English title: The profitability limit in forest drainage.
Original keywords: ojituskelpoisuus; kannattavuus; turvemaat; soiden ojitus; menetelmät; metsäojitusboniteetti
English keywords: profitability; drainability; draining of peatlands; methods
Abstract | View details | Full text in PDF | Author Info

The study describes the relationships between a method developed by the author for the calculation of the profitability of forest drainage and the old biological method. The calculations were based on empirical data, and they aimed at finding out the effect of a variation in the profitability limit in the areas in hectares to be drained, and on the profitability of drainage. The study deals also with the profitability of present-day drainage activities. The results showed that the profitability coefficient (the ratio between the discounted increase in returns and the costs of drainage) averages 3.04 for the whole country. The corresponding value was 5.68 for Southern Finland, 3.19 for Central Finland and 1.67 for Northern Finland.

The PDF includes a summary in English.

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

Category : Article

article id 7192, category Article
Aimo Kaarlo Cajander. (1925). Metsätyyppiteoria. Acta Forestalia Fennica vol. 29 no. 2 article id 7192. https://doi.org/10.14214/aff.7192
English title: The theory of forest types.
Original keywords: metsätyyppi; kasvupaikka; pintakasvillisuus; hyvyysluokka; boniteetti
English keywords: ground vegetation; forest site type; quality class; forest type; forest vegetation
Abstract | View details | Full text in PDF | Author Info

The forest sites have typically been classified by two principles, either as stand quality classes or as locality (site) classes. This article describes the principles of Finnish forest site types (forest quality classes) which are based on classification of localities according to their forest plant associations. All the stands that belong to the same forest site type are characterized by a distinct, more or less identical plant species composition. The forest site types are independent of the tree species. The forest site types in a larger area are relatively numerous, but can be grouped according to their normal form. The Finnish forests are separated to dry moss forest class, the moist moss-forest forest class and grass-herb forest class. The different forest site types belonging to the classes are described in detail. Growth of the trees is different for the different forest site types, but varies little within a same site type. The forest site types suit therefore well for the purposes of forest mensuration and for yield tables. The forest site types reflect also the properties of the soil.

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

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