There is large number of settings in Heureka that can be modifed, see Control table settings at the Heureka wiki. To access a certain control table, use the GrowthCalculator's GetControlTable method. The most common control tables that users make changes are are ProductionModel, TreatmentModel, TreatmentProgramGenerator, Cost and Revenues and, if climatic change should be take into consideration, ClimateModel.

// Example:
var ct = gc.GetControlTable<ProductionModelControlTable>();