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This form specifies the replanting options for croptypes into different croptypes.
Allowing replanting into ‘Bareland’ represents the liquidation of land or no replanting. Replanting from ‘Bareland’ represents the planting of new land.
If new planting is allowed then constraints must be added to the model to limit the amount of new land available for planting. (Without this constraint, the model will be unbounded). This type of constraint can be specified in the New Planting Constraint screen and other types of replanting constraints can be specified in the Replant Constraint form.
Shown below is the replanting advanced screen in LOG 2.0. There are no major changes to this screen since version 1.01, aspects just run more robustly.
Specify the period range over which the relevant replanting option applies. In the first box under the title ‘Periods’ enter the first year the replanting specifications apply for and in the second box enter the final year. Alternatively, selecting the “All Years” check box will mean that the replanting specification applies over the entire length of the planning horizon.
For each set of replanting options, it is necessary to specify the croptypes for which the replanting option is defined, or the source croptype range; and the croptype range into which replanting will take place.
The Source and Destination Croptype Ranges are specified by specifying first a Category and then the appropriate Croptype Range.
Add the associated replanting option to the model.
If the information in a particular replanting option changes after the option has been added to the model using the Add button, the corresponding Update button can be used to update the information in the model.
This button will remove the corresponding replanting option from the model.
The latest version of LOG now includes error checks on all inputs. This means that all fields need to have appropriate entries before the addition to the model is added. If there is something missing, or something in the wrong form, then a message is shown that prompts the user to remedy the situation.