Full text of this article is only available in PDF format.

Veli Pohjonen (email), Timo Pukkala

Cupressus lusitanican tuotos Etiopiassa

Pohjonen V., Pukkala T. (1993). Cupressus lusitanican tuotos Etiopiassa. Silva Fennica vol. 27 no. 3 article id 5511. https://doi.org/10.14214/sf.a15672

English title: Yield of Cupressus lusitanica in Ethiopia.

Abstract

Yield of Cupressus lusitanica Mill. was modelled by predicting the diameter distribution of trees at given stand ages. The beta distribution was used as a theoretical distribution. The models used for the calculation of diameter distribution were based on 66 temporal sample plots with varying age, site and stand density. The growing sites of Cupressus lusitanica were divided into four classes on the basis of age and dominant height. Using the stand models developed in the study, the yield and profitability of different thinning schedules was evaluated by a simulation technique. In the simulated treatment regimes, the mean annual increment varied from 6.6 m3/ha in the poorest site class to 16.6 m3/ha in the best class with rotation lengths ranging from 25 years (best sites) to 34 years (poorest sites). With typical planting densities (1,600 trees/ha), thinnings increase the total harvest by a few percentage points and improved the profitability of plantation forestry.
The PDF includes an abstract in Finnish.

Keywords
distribution; plantation; diameter; yield, models; yield tables; Cupressus lusitanica; thinning regimes

Published in 1993

Views 4931

Available at https://doi.org/10.14214/sf.a15672 | Download PDF

Creative Commons License CC BY-SA 4.0

Register
Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Send to email
Rossi S., Morin H. et al. (2013) Spatially explicit structure of natural stands d.. Silva Fennica vol. 47 no. 3 article id 973 (remove) | Edit comment
Hartikainen E., (1934) Domestic trade of saw timber in 1932 Acta Forestalia Fennica vol. 40 no. 22 article id 7299 (remove) | Edit comment
Kangas J., Klen T. (1982) Exposure of forest workers to herbicides Silva Fennica vol. 16 no. 3 article id 5164 (remove) | Edit comment
Heinonen T., Kurttila M. et al. (2007) Possibilities to aggregate raster cells through .. Silva Fennica vol. 41 no. 1 article id 474 (remove) | Edit comment
Jartti P., (1978) Measurement of internal decay in living trees Silva Fennica vol. 12 no. 2 article id 4997 (remove) | Edit comment
Korhonen L., Korhonen K. T. et al. (2006) Estimation of forest canopy cover: a comparison .. Silva Fennica vol. 40 no. 4 article id 315 (remove) | Edit comment
Kuusipalo J., (2001) Plastic coating of plywood using extrusion techn.. Silva Fennica vol. 35 no. 1 article id 607 (remove) | Edit comment
Kellomäki S., (1975) Studies concerning the relationship between biom.. Silva Fennica vol. 9 no. 1 article id 4912 (remove) | Edit comment
Pohjonen V., Pukkala T. (1993) Yield of Cupressus lusitanica in Ethiopia. Silva Fennica vol. 27 no. 3 article id 5511 (remove) | Edit comment
Your search results