A list of variables provided by a single tree.
These variable names are used when binding a tree to a ex
See also the list of variables available at resource unit level resource unit variables and for sapling variables.
General variables
| Name | Description |
| year | current simulation year. |
Tree variables
| Name | Description |
| id | Unique id (integer) of the tree. |
| dbh | diameter at breast height (cm) |
| height | height (m) |
| ruindex | ID of the RessourceUnit the tree belongs to |
| x | position of the tree (x-direction) (m) |
| y | position of the tree (y-direction) (m) |
| volume | volume of the tree bole (m3) |
| lri | current LightRessourceIndex (0..1) |
| leafarea | current leafarea (m2) |
| lightresponse | LightResonse LRI (0..1) |
| stemmass | stem biomass (kg ODM) |
| branchmass | branch biomass (kg ODM) |
| rootmass | root biomass (kg ODM) (fine + coarse roots) |
| foliagemass | biomass of foliage (kg ODM) linked to leafarea by fixed conversion factor |
| age | Age of tree (years) |
| opacity | opacity factor of tree crown (based on leafarea and crown radius) |
| dead | 1: tree is dead, 0: tree is alive |
| stress | stress level of tree (0..1), 0: no stress, 1: high stress |
| deltad | last year's dbh increment (cm) |
| afoliagemass | foliage mass dervied from allometric equation |
| species | index of tree species within this simulation. 0..n. Note, that species names are available as constants within expressions, thus e.g., 'species=Psme' is valid. |
| basalarea | basal area (m2) of the individual tree. |
| crownarea | area of the crown (m2) (derived from LIP-stamp crown radius) |
| markharvest | 1 if trees is flagged for (future) harvests (0 otherwise) |
| markcut | 1 if trees is flagged for (future) cut-down (0 otherwise) |
| markcrop | 1 if trees is flagged as being a crop tree (0 otherwise) |
| markcompetitor | 1 if trees is flagged as a competitor (to a crop tree) (0 otherwise) |