IPhaseWithTarget

The IPhaseWithTarget interface extends the IPhase interface to define phenological phases that progress toward a specific target value. It provides standardized properties for tracking both the target threshold and the accumulated progress through the phase.

Overview

The IPhaseWithTarget interface is implemented by phenological phases that advance based on accumulating a measurable quantity (typically thermal time in degree days) until a target threshold is reached. This interface extends the basic IPhase contract by adding:

  • A target value that defines when the phase is complete
  • A progress tracker that accumulates the quantity through the phase

Common examples include:

  • Thermal time-based phases that accumulate degree days until emergence, flowering, or maturity
  • Development phases that track cumulative photoperiod or vernalization units
  • Growth stages that progress based on accumulated growing degree days

By standardizing these properties, the interface enables consistent implementation of target-driven phases and allows other models to query phase progress and completion criteria in a uniform way.

Model Structure

This section describes how this model is positioned within the APSIM framework. It outlines the broader structural and computational components that define its role and interactions in the simulation system.

This model inherits structural and functional behaviour from the following core APSIM components:

Model Variables

This section lists the key variables that describe or control the behaviour of this component. Some variables can be adjusted by the user to modify how the model behaves (configurable), while others are calculated internally and can be viewed as model outputs (reportable). For a general explanation of variable types and how they are used within the APSIM Next Generation framework, see the Model Variables Overview.

Configurable and Reportable Properties

This interface inherits all configurable properties from IPhase and adds:

Property Type Description
ProgressThroughPhase double The accumulated progress through this phase (e.g., cumulative thermal time in °Cd). Can be set externally to initialize or adjust phase progress.

Read-Only Reportable Properties

Property Type Description
Target double The target value that must be reached for the phase to complete (e.g., thermal time requirement in °Cd).

See Also