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 | – |