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Harvest By Year
The Harvest By Year constraint is used to restrict a particular periods clearfell volume to that of another period. This constraint is particularly useful for limiting the amount that can be cut in the final period.
The harvest by year constraint window is shown below.
Depending on what is selected in the Category field, a range of croptypes or attribute names will be available in the Croptype Range list. Using the mouse, highlight the desired croptype ranges for which the current specification is to apply. To select consecutive items in the list, click the first item, press and hold down the [SHIFT] key and click the last item. To select non-consecutive items, press and hold [CTRL] and click each item.
It is this periods clearfelling volume that is used to constrain the last periods clearfelling volume.
States whether the constraint is equal to "=", less than "<" or greater than ">" a specified value.
This is the period where the clearfelling volume is constrained.
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.