Version 2.11

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Summary

• Version 2.11.0 has functionality for understorey cleaning in thinnings.
• Biofuel thinning can be triggered automatically if there are many understorey trees.
• No specific pricelist is required for biofuel thinnings, the biofuel price in the ordinary price list is used.

New feature: Understorey cleaning in thinnings (swe: underväxtröjning vid gallring)

Understorey cleaning means that small trees are removed before thinning. Typically these trees has dbh < 8 cm, and gives no timber or pulpwood, but obstruct the harvester machine. Rules for understory cleaning is determined by a set of new parameters in the TreatmentModel control table, for example a diameter limit for classification of understorey trees, and a stem density threshold that will trigger such a cleaning. The cost for understorey cleaning is entered in the Cost and Revenue control table as a per-ha fixed cost. There is also an alternative cost for NOT doing an understorey cleaning when there are many understorey trees (parameter "Harvester Time Increase from Understorey Trees"). By default, the time increases by 0.4 cmin/tree for every 1000 understorey trees that remain when doing a thinning. You can read more about understorey cleaning in this new help chapter.

New feature: Biofuel thinning can be triggered automatically if there are many understorey trees

You can tell the program to trigger a biofuel thinning if the number of understorey trees exceeds a certain limit (parameter "Understorey Density Trigger Biofuel Thinning" in the TreatmentModel control table). The feature is deactivated by default. Read more here: Help doc.

Simplification: No additional pricelist required for biofuel thinning

Biofuel thinning is a special type of thinning that can be applied in young stands, and can also be triggered automatically from this version of the program (see above). Biofuel thinning has its own cost functions, since the machinary is different from a single-tree thinning harvester. In bio fuel thinning it is assumed that all cut trees are sold as biofuel. To handle this in Heureka, until now you had to do a workaround by entering a specific price list with a large top diameter limit for timber and pulpwood. As a result, only bio fuel was obtained from the trees. This was an unnecessary complicated solution! Instead, all cutt trees in biofuel thinnings are now considered bio fuel, and the price is retrieved from the same pricelist used for thinnings.

New result variables: Mean tree volum m³fub, StemsOverstorey

The following result variables have been added

Name	Result Group	Unit	Description
Mean Tree Volume Harvested	Financial Value	m3fub/tree	Not to be confused with the old variable "Average Volume per Harvested Tree" in result group Treatment which is given in unit m3sk/tree. Mean Tree Volume Harvested is a result from bucking (aptering), which is why is is located in another result group.
Understorey Cleaning Cost	Financial Value	cost per ha	Cost per ha for understorey cleaning (underväxtröjning)
Understorey Stems	Forest Data	tree/ha	Number of trees in established stands with dbh < MadDiameterUnderstorey (in TreatmentModel control table).
Understorey Cleaned	Treatment	trees/ha	Number of understorey trees removed before a thinning.
	Forest Data

Bug fixes and other changes

Id	Category	Severity	Summary	Fixed_in_version	Resolution	Comment
0000211	TPG	major	Youngs stands not thinned in first harvest period even if thinning criteria met	2.11.1	fixed
0000212	TPG	minor	Thinning Period Delay Generation 2 only applied from generation 3 onward	2.11.1	fixed
0000213	TPG	tweak	Treatment program generator tests alternatives with invalid thinning periods	2.11.1	fixed
0000214	TPG	minor	Enforced thinning sometimes applied even if a valid thinning period is found	2.11.1	fixed
0000192	Visualisation StandWise	minor	Adding a DEM (Digitial Elevation Model) in StandWise results in an index error.	2.11.0	fixed
0000208	TPG	feature	Add a button that allows the user to select species of trees to print to log	2.11.0	fixed
0000205	TPG	major	Initial state mean age for young plantation set to 0 after TPG	2.11.0	fixed	If you have clicked the "Update"-button in the Initial State window after running a simulation, the mean age of young plantations have been reset to 0, even if they were for example 2 years old. This has been a bug since version 2.8.0 (September 2017). The error have not affected simulations and results, only the tables and graphs in the Initial State window, and only for young plantations. Results reports in PlanWise and RegWise have not been affected.
0000206	TPG	minor	Rerun of simulations for unmanaged stands ignored period midth	2.11.0	fixed
0000198	TPG	minor	Initial bare land is not regenerated when rerunning a simulation when using NFI-data plots as input data	2.11.0	fixed	The function for rerunning an optimization result in PlanWise (introduced as beta in version 2.6) or simulation result in RegWise, did not handle regeneration of initial bare land as it should when using NFI-data plots as input data.
0000207	TPG	minor	Print tree list during rerun of simulation crashes the program for large simulations	2.11.0	fixed
0000201	Other	minor	Error when saving and loading default result variables in result variable selection dialog	2.11.0	fixed
0000210	Other	minor	StandWise hangs when selecting properties	2.11.0	fixed
0000199	Optimization	feature	Spara del av optimeringsmodell	2.11.0	fixed
0000191	Map	minor	Error "Invald column name..." when saving shapefile	2.11.0	fixed	This bug first occurs in version 2.10, and was caused by an incorrect column name IsNcUnitSetAsideDuringImport leading to an SQL exception when trying to save a shape file from the "Initial State" map window.
0000209	Installation	major	Exception in StandWise if neither PlanWise or RegWise has been run due to missing habitat model files.	2.11.0	duplicate
0000195	Growth / production	major	Inconsistent growth in StandWise	2.11.0	fixed	Stems residual was not reset when backing a PredictionUnit, causing the value to remain for subsequent programs after resetting
0000197	Growth / production	feature	Skip pricelist for biofuel thinning and assume all felled trees are bio fuel	2.11.0	fixed	See help doc on setting biofuel price
0000189	General	minor	Price trend handler may start unnecessary recalculation	2.11.0	fixed	Unnecessary recalculation removed.
0000204	Data import	minor	User should be notified when column names are wrong in tree list import files	2.11.0	fixed	When importing tree-level data, miss-spelled column names would be ignored resulting in data not being imported as expected. The user is now notified if column names are wrong or mandatory columns are missing.
0000202	Control categories	minor	No pricelists selected after adding cost control table from file	2.11.0	fixed
0000203	Control categories	minor	Control table file name should be added so user can separate different versions	2.11.0	fixed