In sprinkler irrigation, the 'application rate' should be:
Choose the correct answer
Always 100 mm/hour regardless of soil type
Not exceed the soil''s infiltration rate to prevent runoff — matched to soil permeability
As high as possible for speed
Zero mm/hour (sprinklers do not apply water to soil)
Correct Answer
B. Not exceed the soil''s infiltration rate to prevent runoff — matched to soil permeability
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Application rate of sprinkler system must be ≤ infiltration rate of soil. If application rate > infiltration rate → surface runoff and ponding (defeating purpose). Application rate depends on: nozzle size, pressure, and sprinkler spacing. Design: application rate 5–15 mm/hour for typical soils; adjust for clay (low k) and coarse sand (high k).
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