Calculate lower-quarter uniformity, application rate and time to a target average depth.
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Calculate lower-quarter uniformity, application rate and time to a target average depth.
Runs in your browser
Inputs are processed on this page and are never sent to a server.
For irrigation technicians: place identical cans on an equally spaced grid under fixed sprinklers. Enter 4–200 depths in mm, in multiples of four. Lowest-quarter mean divided by overall mean gives DU. Runtime targets the average, not dry spots. No pivot weighting, runoff or crop-water recommendation.
DUₗq = Lowest quarter ÷ Mean depth × 100; mm/h = mm × 60 ÷ min
72.727273%
DUₗq = Lowest quarter ÷ Mean depth × 100; mm/h = mm × 60 ÷ min
72.727273%
No. It raises all collected depths without improving their ratio. Inspect the system separately.
Calculations run on your device. Form inputs are not sent to a server.
The initial choice follows your browser region. Your choice is remembered on this device. Gallons are US gallons. Switching units keeps your numbers unchanged and interprets them in the new unit.
Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
Enter each measurement in its own numbered box. Use the unit shown beside this field. mm / in
Minimum: 0 · Maximum: 10000 mm
Enter a numerical value for this quantity. Use the unit shown beside this field. min
Minimum: 0.01 · Maximum: 1440 min
Runtime targets the average, not dry spots.
Enter a numerical value for this quantity. Use the unit shown beside this field. mm / in
Minimum: 0 · Maximum: 1000 mm
For irrigation technicians: place identical cans on an equally spaced grid under fixed sprinklers. Enter 4–200 depths in mm, in multiples of four. Lowest-quarter mean divided by overall mean gives DU. Runtime targets the average, not dry spots. No pivot weighting, runoff or crop-water recommendation.
Calculated from your entries using the method below.
Enter 4–200 depths in mm, in multiples of four.
Calculated from your entries using the method below.
For irrigation technicians: place identical cans on an equally spaced grid under fixed sprinklers. Enter 4–200 depths in mm, in multiples of four. Lowest-quarter mean divided by overall mean gives DU. Runtime targets the average, not dry spots. No pivot weighting, runoff or crop-water recommendation.
Calculated from your entries using the method below.
Runtime targets the average, not dry spots.
Calculated from your entries using the method below.
For irrigation technicians: place identical cans on an equally spaced grid under fixed sprinklers. Enter 4–200 depths in mm, in multiples of four. Lowest-quarter mean divided by overall mean gives DU. Runtime targets the average, not dry spots. No pivot weighting, runoff or crop-water recommendation.
Calculated from your entries using the method below.
Enter 4–200 depths in mm, in multiples of four.
Calculated from your entries using the method below.
Lowest-quarter mean divided by overall mean gives DU.
Calculated from your entries using the method below.
Mistake: Changing units and assuming the entered numbers were converted.
Fix: Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
Mistake: Treating a result as valid outside the described scope.
Fix: No. It raises all collected depths without improving their ratio. Inspect the system separately.
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