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Table 1 Main notations used in the paper

From: Fagacées: a tree-centered growth and yield model for sessile oak (Quercus petraea L.) and common beech (Fagus sylvatica L.)

Symbol

Signification

Unit

N

Number of trees per hectare in the stand

Number/ha

A

Age of the stand (age of the trees within the stand)

Years

RDI

Relative Density Index

H 0

Top height of the stand

m

H

Average height of the stand

m

H 100

Site Fertility Index (top height at age 100)

m

h

Individual height of a tree

m

D 130 or DBH

Diameter at 130 cm (breast height)

cm

D g

Average quadratic diameter of the stand

cm

d 130

Individual diameter at 130 cm

cm

d(z)

Individual diameter at height z

cm

G

Basal area of the stand

m²/ha

g

Basal area of the tree

cm²

σ

Threshold circumference for individual growth

cm

γ

Maximum efficiency of growth

cm/year

μ 1 to μ 7

Parameters of the individual diameter profile

 

c r

Crown ratio of a tree

r h

Crown radius of a tree

m

φ

Parameter to control batch thinning