Current issue: 55(3)

Under compilation: 55(4)

Scopus CiteScore 2019: 3.1
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Silva Fennica 1926-1997
1990-1997
1980-1989
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1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles containing the keyword 'formula'.

Category: Article

article id 7208, category Article
T. Heikkilä. (1927). Über die Ermittelung der Querfläche eines Stammes. Acta Forestalia Fennica vol. 32 no. 3 article id 7208. https://doi.org/10.14214/aff.7208
English title: On examining the cross-sectional area of a stem.
Original keywords: Querfläche; Formel; Stamm
English keywords: cross-sectional area; formula; stem

Because the cross-sectional area of a tree stem is ellipsis, it cannot be determined exactly with only the diameter measurement.  The article presents a formula and the calculation of the exact cross-sectional area. If the cross-sectional area is calculated as arithmetic mean of two diameter measurement, varies the error between two limit values. The error becomes smallest by calculating the area based on the biggest and the smallest diameter measurements. 

  • Heikkilä, ORCID ID:E-mail:
article id 7204, category Article
Erik Lönnroth. (1927). Über Stammkubierungsformeln. Acta Forestalia Fennica vol. 31 no. 5 article id 7204. https://doi.org/10.14214/aff.7204
English title: On volume formulas.

Volume formulas have been developed already for long time but there are still some questions to be solved. The volume of a stem can be calculated based on measurements of diameter on various heights or based on mathematic formula. The article presents the formula development for that. The study is based on measurements of 24 pine stands.   

The results of the new formula can be seen satisfactory with the relatively small data of this study. Coincidentally the formally best mean solution of the here compared volume calculation formulas was the one based on Denzin’s formula. There the deviation from total mean is almost zero.   

  • Lönnroth, ORCID ID:E-mail:
article id 7204, category Article
Erik Lönnroth. (1927). Über Stammkubierungsformeln. Acta Forestalia Fennica vol. 31 no. 5 article id 7204. https://doi.org/10.14214/aff.7204
English title: On volume formulas.

Volume formulas have been developed already for long time but there are still some questions to be solved. The volume of a stem can be calculated based on measurements of diameter on various heights or based on mathematic formula. The article presents the formula development for that. The study is based on measurements of 24 pine stands.   

The results of the new formula can be seen satisfactory with the relatively small data of this study. Coincidentally the formally best mean solution of the here compared volume calculation formulas was the one based on Denzin’s formula. There the deviation from total mean is almost zero.   

  • Lönnroth, ORCID ID:E-mail:

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