NCI Size Effect Mode, in cm (X0) | The mode of the size effect curve. |
NCI Size Effect Variance, in cm (Xb) | The variance of the size effect curve. |
Size Effect is calculated as:
where:
NCI Size Effect Mode, in cm (X0) | The mode of the size effect curve. |
NCI Size Effect Variance, in cm (Xb) | The variance of the size effect curve. |
NCI Size Effect Minimum Diameter | The minimum possible diameter for size effect. Trees with a diameter less than this value will use this value in the size effect calculation instead. |
Size Effect is calculated as:
where:
You can set a minimum diameter for the size effect in the NCI Size Effect Minimum Diameter parameter. Any target tree whose diameter is less than this value will get a size effect based on the minimum diameter instead. This allows you to avoid problems with very small trees that can occur because of the shape of the lognormal function.
NCI Size Effect "a" | Size effect power function scaling factor "a" parameter. |
NCI Size Effect "b" | Size effect exponent "b" parameter. |
Size Effect is calculated as:
where: