This pane is on the MODFLOW Features tab of the Object Properties dialog box.
TRANSPIRATION_FRACTION (FTR) is the fraction of consumptive use that is the potential transpiration of the crop.
Formally defined as FTR = Kcb/Kc = Basal Crop Coefficient / Crop Coefficient
It can be viewed as the fraction of a unit cropped area covered by leaf matter, i.e. crop cover.
If it is set to zero, then the crop is assumed to be fallowed or its area is bare soil.
If no value is specified, a value of 1 will be used.
