Jonsson_1980_height_Birch_101_126: Height function for Birch between 101-126 yr, from Jonsson...

In Silviculturalist/forester: Forest Science and Forestry

Height function for Birch between 101-126 yr, from Jonsson (1980)

Description

Written to be used with the Swedish National Forest Inventory's 6.64 m radius plots.

Usage

Jonsson_1980_height_Birch_101_126(
  jonson_bonitet,
  diameter_at_breast_height,
  diameter_of_largest_tree_on_plot,
  age_at_breast_height,
  latitude,
  altitude
)

Arguments

jonson_bonitet	1-7 are available.
diameter_at_breast_height	Diameter at breast height above bark in cm
diameter_of_largest_tree_on_plot	Diameter of thickest tree on plot.
age_at_breast_height	Age at breast height.
latitude	Latitude, degrees.
altitude	Meters above sea level.

Details

This function originally for ln( increment). Result has been re-transformed. Log. bias assumed to be included in written coefficient.

Standard Deviation: 0.1699 Number of trees: 342 Coefficient of multiple correlation: 0.88

Value

mm, diameter increment during five years.

Source

Jonsson, B. (1980) "Functions for the long-term forecasting of the size and structure of timber yields". Report #7. Section of Forest Mensuration and Management. Swedish University of Agricultural Sciences. ISSN: 0349-2133. ISBN: 91-576-0477-0. Umeå. p. 102.

Silviculturalist/forester documentation built on April 20, 2024, 2:13 p.m.