Farm Turnout Requirement (\( FTR \)):

\[ FTR = IR + FDL \]

Where:

• \( FTR \) is the farm turnout requirement, in millimeters per day (mm/day).
• \( IR \) is the irrigation requirement, in millimeters per day (mm/day).
• \( FDL \) is the farm ditch loss, in millimeters per day (mm/day).