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Metsätieteen aikakauskirja Dissertationes Forestales Suo - Mires and Peat
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Full text of this article is only available in PDF format.

Pekka Kilkki (email), Matti Maltamo, Reijo Mykkänen, Risto Päivinen

Use of the Weibull function in estimating the basal area dbh-distribution.

Kilkki P., Maltamo M., Mykkänen R., Päivinen R. (1989). Use of the Weibull function in estimating the basal area dbh-distribution. Silva Fennica vol. 23 no. 4 article id 5392. https://doi.org/10.14214/sf.a15550

Abstract

The paper continues an earlier study by Kilkki and Päivinen concerning the use of the Weibull function in modelling the diameter distribution. The data consists of spruces (Picea abies (L.) H. Karst.) measured on angle count sample points of the National Forest Inventory of Finland. First, maximum likelihood estimation method was used to derive the Weibull parameters. Then, regression models to predict the values of these parameters with stand characteristics were calculated. Several methods to describe the Weibull function by a tree sample were tested. It is more efficient to sample the trees at equal frequency intervals than at equal diameter intervals. It also pays to take separate samples for pulpwood and saw timber.

The PDF includes an abstract in Finnish.

Keywords
Picea abies; distribution; diameter; Weibull function; maximum likelihood; estimation

Published in 1989

Views 8833

Available at https://doi.org/10.14214/sf.a15550 | Download PDF

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