home
focus and scope
journal policies
Focus and scope Peer review process Openness and transparency Publication frequency Archiving Article processing charges Criteria for authorship and contributors Conflicts of interest Allegations of misconduct Complaints process Sponsors Journal History
author instructions
General Metadata Article Categories Openness and transparency Submission of manuscripts Manuscript text Citation standards Tables and figures Acknowledgements, funding and availability of research materials and data Supplementary files Procedures for revised and accepted manuscripts
special issues
editors
open access
other journals
Metsätieteen aikakauskirja Dissertationes Forestales Suo - Mires and Peat
contact
financial information
Full text of this article is only available in PDF format.

Aarne Nyyssönen (email), Yrjö Vuokila

The effect of stratification on the number of sample plots of different sizes

Nyyssönen A., Vuokila Y. (1963). The effect of stratification on the number of sample plots of different sizes. Acta Forestalia Fennica vol. 75 no. 2 article id 7136. https://doi.org/10.14214/aff.7136

Abstract

It is necessary to study the problems related to the size, number and location of sample plots as well as to the effect of stratification. This paper, mainly concerned with the volume of the growing stock based on measurements, comprises a part of the research in progress related to the issue.

The study contains a discussion of certain problems relevant to the planning of a forest inventory on the basis of variation in the volume of the growing stock. In particular, the aim has been to give data for selection of the size and number of sample plots, and to illustrate the importance of stratification, here based principally on dominant height.

The research material comprised two forest areas of 10 ha each; measurement of the growing stock was made in units of 49 m2. Based on the data was constructed a model area embracing 4 forested strata and one non-forested stratum. The mean and standard deviations of the volumes was calculated for the forest area as a whole and for the different strata. On studying stratification, two approaches were employed to distribute the sample plots among the strata: optimum allocation and proportional allocation. The latter is simple in application, and gave for forested areas number of sample plots which did not exceed by more than 10% those obtained by optimum allocation. It is obvious that the application of stratification is worthy of consideration within forest areas which comprise parts with distinct differences. The decrease in number of plots with increasing plot size is considerably more marked within a stratified area. Thus, larger sample plots should be used in the former case than in the later. The investigations give hints on how forest inventories should be carried out. However, it has some limitations, which are discussed in the paper.

The PDF includes a summary in English.

Keywords
forest inventory; inventory; methods; sample plots

Published in 1963

Views 1563

Available at https://doi.org/10.14214/aff.7136 | 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
Export reference to EndNote / RefWorks
Related articles
Your selected articles
Send to email
Pohjonen V., (1974) Effect of spacing on the first-year yield and he.. Silva Fennica vol. 8 no. 2 article id 4901 (remove) | Edit comment
Kelemen K., Mihók B. et al. (2012) Dynamic response of herbaceous vegetation to gap.. Silva Fennica vol. 46 no. 1 article id 65 (remove) | Edit comment
Kuusela K., (1960) Volume and increment calculation of a sample plo.. Acta Forestalia Fennica vol. 71 no. 6 article id 7115 (remove) | Edit comment
Saastamoinen O., (1979) Time patterns in the use of an urban skiing route Silva Fennica vol. 13 no. 1 article id 5020 (remove) | Edit comment
Kowalska A., Matuszkiewicz J. M. et al. (2017) Indicators of ancient forests in nutrient-defici.. Silva Fennica vol. 51 no. 1 article id 1684 (remove) | Edit comment
Bramryd T., (1981) Environmental effects of heavy metals distribute.. Silva Fennica vol. 15 no. 4 article id 5145 (remove) | Edit comment
Cautón A. J., (1937) Practices of forest drainage work Silva Fennica vol. no. 39 article id 4491 (remove) | Edit comment
Leikola M., (1979) Benefits of MAB Project 2 by the research work o.. Silva Fennica vol. 13 no. 2 article id 5028 (remove) | Edit comment
Järveläinen V.-P., (1969) Opinions about silviculture in farm forestry in .. Silva Fennica vol. 3 no. 3 article id 4800 (remove) | Edit comment
Kurth W., Sloboda B. (1997) Growth grammars simulating trees – an extension .. Silva Fennica vol. 31 no. 3 article id 5626 (remove) | Edit comment
Klen T., Louhevaara V. (1978) The additional physical strain caused by safety .. Silva Fennica vol. 12 no. 3 article id 4999 (remove) | Edit comment
Kiser J., (2011) Histochemical and geometric alterations of sapwo.. Silva Fennica vol. 45 no. 4 article id 447 (remove) | Edit comment
Vuoristo I., (1935) Working efficiency in timber cutting and hauling.. Acta Forestalia Fennica vol. 42 no. 5 article id 7322 (remove) | Edit comment
Wang Y., Korpelainen H. et al. (2006) Microsatellite polymorphism in the edaphic spruc.. Silva Fennica vol. 40 no. 4 article id 314 (remove) | Edit comment
Your search results
Nyyssönen A., Vuokila Y. (1963) The effect of stratification on the number of sa.. Acta Forestalia Fennica vol. 75 no. 2 article id 7136
Vuokila Y., (1970) Selection from above in Intermediate cuttings Acta Forestalia Fennica vol. 0 no. 110 article id 7544
Silva Fennica · Finnish Society of Forest Science