ControlTable Production Model

See http://heurekaslu.org/help/index.html?kontrolltbl_production_model.htm

Note: The info here is a little bit out of date.

In the production model control table you can configure the simulation of the forests' development, i.e. how trees establish, grow, and finally die if not harvested before that.

Growth and yield

Allows you to control the net growth and yield from harvests, by applying certain models/-components in the simulations. : :

Growth Model Individual-Tree

Elfving implies that the model by Elfving will be used in calculation of each trees' diameter development at the plot-level (the prediction unit).

Soderberg implies that the model by Söderberg will be used in calculation of each trees' diameter development at the plot-level (the prediction unit).

Growth Model Whole-Stand

None implies that no basal area development, as the sum for all trees at the plot-level, will be used in growth calculations.

Elfving2005 implies that the model by Elfving, anno 2005, will be used in calculation of basal area development at the plot-level (the prediction unit).

Elfving2009 implies that the model by Elfving, anno 2009, will be used in calculation of basal area development at the plot-level (the prediction unit).

Growth: Include Thinning Response

True if thinning response function should be applied, false otherwise. Only applied to even-aged stands.

Growth Factor

Adjustment factor for basal area growth in established forest. Default = 1, i.e. no adjustment. Should normally not be changed, intended for research purposes.

Volume Function

Selected volume function.

Height Development Model

ErikssonElfving implies that the model by Eriksson and Elving will be used in calculation of height development.

SoderbergWithTreeAge implies that the model by Söderberg including single tree ages will be used in calculation of height development.

SoderbergWithStandAge implies that the model by Söderberg including average stand ages will be used in calculation of height development.

Height: Initial Height Function

SoderbergWithTreeAge implies that the model by Söderberg including single tree ages will be used in calculation of initial tree heights.

SoderbergWithStandAge implies that the model by Söderberg including average stand ages will be used in calculation of initial tree heights.

Height:Initial Height Source

UseFunction implies that the model selected in InitialHeightModel (above) will be used.

FromDatabase implies that initial tree heights will be obtained from an available database [The Hugin young forest-database?].

Height Calibration

True means that tree heights will be calibrated, False do not. Calibration factors are calculated using sample tree data.

Mortality Implementation

Deterministic will apply deterministic components in the mortality model (recommended).

Stochastic will apply stochastic components in the mortality model

Mortality Model

Selected mortality model. Default value for parameter "Calibrate Bengtsson" will depend on what mortality model is selected.

Mortality Factor Established Forest

Adjustment factor for mortailty in established forest (mean height > about 7 m). Default = 1, i.e. no adjustment.

Calibrate Bengtsson

Set to True if mortality rates according to Göte Bengtsson should be applied (for small basal areas), independent of selected Mortality Model. This means the mortality model is only responible for distributing mortality over trees.

Calibrate Söderberg

Set to True if the self thinning limit (for large basal areas) according to Söderberg (1986) should be applied. This means the mortality model is only responible for distributing mortality over trees.

Mortality for Retained Trees 1-5

Mortality rate for retained trees during the first 5-year period, defined per each species group.

Mortality for Retained Trees 6-10

Mortality rate for retained trees during the second 5-year period, defined per each species group.

Adjust Mortality for Retention Patches

Set to FixedMortality to let mortality in a retention patch depend (i.e. increase) if and when the main stand is clear cut. If FixedMortality is selected, mortality is set in Mortality in Retention Patches. These parameters are hidden if NoAdjustment is chosen, meaning that the mortality is not affected by a clear cut of the main stand.

Mortality in Retention Patches year ...

These parameters has the same functionality as Mortlaity for Retention Trees, but applies to whole retentions patches and edge zones if Adjust Mortality for Retention Patches = Fixed Mortality.

Site Index Ajdustment

Adjustment factor for site index. Default value = 1. Intended for research purposes.

Height Threshold Young/Mature

Defines the arithmetic mean tree height at which a "sapling" stand is considered a "mature" "tree" plot. Calculated for each plot. When at least 90% (?) of the plots are no longer sapling plots, then the stand is classified as a mature stand and not young.

Age settings

Allows you to control how different types of ages, at tree-level, should be handled in the simulations.

Year to Breast Height Model

Elfving implies that the model by Elfving will be used in calculation of the age of a tree when it reach breast height (1.3 m).

Tax implies that the model from the Swedish NFI will be used in calculation of the age of a tree when it reach breast height (1.3 m).

Calibrate Age To Register Value, Established Stands

True implies that tree ages will be calibrated so that the mean age will be as close as possible to the mean age entered in the input data source. False do not. Calibration is not applied if the mean age according to Heureka differs by more than 30 % to the input data.

Initial Age Source

UseFunction: The built-in function will be used to assign initial ages.

FromDatabase If the database contains tree ages, these will be used as intial tree ages.

Regeneration

Allows you to control how the forest regeneration, the establishment of new trees, should be handled in the simulations.

IngrowthModel

Deterministic applies deterministic ingrowth model components, where ingrowth is defined as the establishment of other seedlings than those planted.

Stochastic applies stochasitc ingrowth model components, where ingrowth is defined as the establishment of other seedlings than those planted.

None applies no ingrowth/establishment of other seedlings than those planted.

PlantDamageFactor

Defines the factor of which damages upon seedlings and saplings should be simulated, expressed in value range (0, 2).

PlantDiameterModel

Elfving implies that the model by Elfving will be used in calculation of the saplings' diameter.

NystromSoderberg implies that the model by Nyström and Söderberg will be used in calculation of the saplings' diameter.

PlantHeightGrowthModel

ElfvingHugin implies that the model by Elfving, with information from the Hugin young forest-database, will be used in calculation of the saplings' height development (at the plot-level).

NystromSingleTree implies that the model by Nyström will be used in calculation of each saplings' height development, i.e. at the single tree-level.

SkipIngrowthStepOne

True implies that the first step, in the first 5 year-period, of ingrowth will not be simulated, False do not.