Logistic growthThis behavior does either diameter or height growth as a function of GLI. Parameters for this behavior| Parameter name | Description |
|---|
| Logistic - Asymptotic Diam Growth - Full Light in mm/yr (a) | Asymptotic annual growth at full light, in mm/yr, for diameter growth. | | Logistic - Diam Shape Param 1 (b) | Shape parameter 1, for diameter growth. | | Logistic - Diam Shape Param 2 (c) | Shape parameter 2, for diameter growth. | | Logistic - Asymptotic Height Growth - Full Light in cm/yr (a) | Asymptotic annual growth at full light, in cm/yr, for height growth. | | Logistic - Height Shape Param 1 (b) | Shape parameter 1, for height growth. | | Logistic - Height Shape Param 2 (c) | Shape parameter 2, for height growth. |
How it worksThe amount of diameter increase is calculated as:  where - Y = amount of diameter increase, in mm, or the amount of height increase, in cm
- a = Logistic - Asymptotic Diam Growth - Full Light in mm/yr (a) parameter (for diameter growth) or the Logistic - Asymptotic Height Growth - Full Light in cm/yr (a) parameter (for height growth)
- b = Logistic - Diam Shape Param 1 (b) parameter (for diameter growth) or the Logistic - Height Shape Param 1 (b) parameter (for height growth)
- c = Logistic - Diam Shape Param 2 (c) parameter (for diameter growth) or the Logistic - Height Shape Param 2 (c) parameter (for height growth)
- GLI = global light index, as a percentage between 0 and 100, calculated by a light behavior
- T = number of years per timestep
How to apply itThis behavior can be applied to seedlings, saplings, and adults of any species. Any tree species/type combination to which it is applied must also have a light behavior applied. You can choose either a diam with auto height, diam only, or height only version. |