Jonsson_1980_self_thinning: Jonsson (1980) self thinning function

In Silviculturalist/forester: Forest Science and Forestry

Jonsson (1980) self thinning function

Description

Jonsson (1980) self thinning function

Usage

Jonsson_1980_self_thinning(
  stem_number_per_ha,
  jonson_bonitet,
  annual_basal_area_increment_percent
)

Arguments

stem_number_per_ha	Number of stems per hectare.
jonson_bonitet	numeric. Jonson site classes 1-7.
annual_basal_area_increment_percent	Annual basal area increment, in percent.

Details

Standard deviation = 30.3 Multiple correlation coefficient = 0.60 Material: Untouched parcels on permanent trial sites, 127 revisions.

Value

Self thinned volume in percent of the annual volume increment.

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. 120.

Examples

self_thinning_df <- data.frame("Bonitet"=c(1,1,1,1,1,

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