Johansson_2011_height_trajectory_Sweden_Poplar: Height trajectory for Poplar on former farmland in Sweden...

In Silviculturalist/forester: Forest Science and Forestry

Height trajectory for Poplar on former farmland in Sweden from Johansson 2011.

Description

Abstract:

"Site index (SI) curves for H 20 (dominant height at 20 years total age) were constructed using growth data from 64 hybrid poplars (Populus spp.) growing in 33 stands planted on farmland in Sweden (Lat. 55–60°N). The mean age of the stands was 24 years (range 14–45), the mean density 993 stems ha−l (155–3493), and the mean diameter at breast height (outside bark) 24 cm (10–45). SI curves fitted for H 20 at total age were well in accordance with the SI curves presented by other studies. A number of dynamic equations for modeling top-height growth from total age were assessed. A generalized algebraic difference approach (ADA) model derived by Cieszewski performed best. The model explained 98

Usage

Johansson_2011_height_trajectory_Sweden_Poplar(
  dominant_height,
  age,
  age2,
  output = "Height"
)

Arguments

dominant_height	Dominant height of stand, m.
age	Total age.
age2	Total age at output age.
output	One of "SIH100","Equation" or "Height".

Value

m.

Source

Johansson, T. (2011) Site index curves for Poplar growing on former farmland in Sweden. Scandinavian Journal of Forest Research 26(2): 161-170. Available: https://doi.org/10.1080/02827581.2010.543428

Examples

#SIH50 40 m: 40 m at age 50.
Johansson_2011_height_trajectory_Sweden_Poplar(dominant_height = 40,age = 50,output="Equation")

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