What two metrics does a catch-can test assess in irrigation performance?

What two metrics does a catch-can test assess in irrigation performance?

• A. Measures irrigation pump energy use
• B. Measures soil pH and salinity
• C. Measures leaf chlorophyll content
• D. Measures distribution uniformity and precipitation rate

Answer: (D)

A catch-can test evaluates irrigation performance by measuring how water is distributed and how much water is applied over the area and time. By placing multiple catch cans in a grid under the irrigation layout, you can calculate distribution uniformity, which reveals how evenly the water reaches all spots. You also determine the precipitation rate from the total water collected, the area covered, and the test duration, showing whether the system delivers water at the intended rate. These two metrics together tell you if the irrigation is both uniform and correctly paced. The other options relate to energy use, soil chemistry, or plant health, which aren’t measured by this test.

A catch-can test evaluates irrigation performance by measuring how water is distributed and how much water is applied over the area and time. By placing multiple catch cans in a grid under the irrigation layout, you can calculate distribution uniformity, which reveals how evenly the water reaches all spots. You also determine the precipitation rate from the total water collected, the area covered, and the test duration, showing whether the system delivers water at the intended rate. These two metrics together tell you if the irrigation is both uniform and correctly paced. The other options relate to energy use, soil chemistry, or plant health, which aren’t measured by this test.