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Pekka Kilkki (email), Tapani Pohjola, Eljas Pohtila

Puiden ryhmittäisyyden huomioonottaminen harvennusmalleissa.

Kilkki P., Pohjola T., Pohtila E. (1985). Puiden ryhmittäisyyden huomioonottaminen harvennusmalleissa. Silva Fennica vol. 19 no. 2 article id 5235. https://doi.org/10.14214/sf.a15414

English title: Use of the spatial distribution of trees in thinning models


Thinning models are generally based on the density of the stand measured by the average basal area per hectare, for instance. These models are handicapped by the uneven structure of the stands. In uneven stands the averages are inadequate indicators for the need and amount of thinnings.

Small relascope plots were tested in the measurement of the spatial distribution of trees and in the determination of the need and amount of thinnings. The thinning quantity was determined as the difference between the actual distribution of the relascope plots into basal area classes and the ideal distribution after thinning. Sequential sampling was used in the derivation of the decision equations. A respective BASIC-program for a programmable pocket calculator is given.

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Original keywords
harvennus; harvennusmallit; mallinnus; puiden ryhmittäisyys

English keywords
thinnings; spatial distribution; relascope plots; thinning models; basal area classes

Published in 1985

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Available at https://doi.org/10.14214/sf.a15414 | Download PDF

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Pukkala T., Kolström T. (1991) Effect of spatial pattern of trees on the growth.. Silva Fennica vol. 25 no. 3 article id 5449