Current issue: 58(5)
Acta Forestalia Fennica vol. 3 | 1914
Category : Article
The article deals with outer characters of a pine from Patsjoki-river, in Finnish Lapland (Pinus silvestris L. var. lapponica (Fr.) Hn.). The tables describe the length of the needles, length of the shoots, branching and inflorescence. The statistical calculations of the data are based on W. Johannsen’s (Elemente der exakten Erblichkeitslehre, Jena 1909) (Elements of exact genetics) methods. The results cannot be generalized because of the insufficient amount of data.
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Renvall,
E-mail:
ar@mm.unknown
The aim of the study is to generate yield tables that enables calculating the stumpage values of the forests in different ages. The article investigates the diameter distribution of a stand at the breast height and their changes with the age of the stand. In an even-aged stand the calculating of the stumpage value is based on height and breast height diameter. Hence the diameter distribution of a stand determines the stand volume, the stem frequency distribution series can be used as the basis of compiling the yield tables, in which the volume is the main factor.
The study is based on spruce and pine mensuration data from Finland, pine stands from Prussia, and spruce stands from mountainous area of Switzerland. The article presents the characteristics of stem frequency distribution series based on the data. The studied characteristics are arithmetic middle, dispersion, asymmetry (skewness) and excess.
It can be recommended to create tables that show the different developments for age classes. Based on such tables the expected value of the stand can be calculated in practical forest management. Determining a general value of a stand in different forest site types would be important for forest valuation and forest statistics.
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Cajanus,
E-mail:
wc@mm.unknown
