What method can be used to test irrigation coverage besides visual inspection?

What method can be used to test irrigation coverage besides visual inspection?

• A. Soil pH test kit
• B. Catch-can test or flow meter
• C. Leaf nutrient test
• D. Tensiometer reading only

Answer: (B)

Irrigation coverage is best tested with a method that measures how water is distributed across the landscape, not just what the system looks like while it’s running. A catch-can test, often used with a flow meter, does this directly. In a catch-can test you place several small containers—catch cans—in a grid under the irrigation area and run the system for a fixed time. Afterward, you measure how much water each can collected. The differences show which spots are receiving too much or too little water, giving you a clear map of distribution uniformity. This lets you adjust nozzles, spacing, pressure, or cycling to even things out. A flow meter adds another layer by quantifying the actual water flow, helping verify the system is delivering the intended volume and identifying zones with mismatched flow. The other options aren’t about how evenly water lands across the area. Soil pH testing, leaf nutrient testing, or a tensiometer reading focus on soil chemistry, plant nutrients, or soil moisture status, respectively, rather than the spatial distribution of irrigation.

Irrigation coverage is best tested with a method that measures how water is distributed across the landscape, not just what the system looks like while it’s running. A catch-can test, often used with a flow meter, does this directly.

In a catch-can test you place several small containers—catch cans—in a grid under the irrigation area and run the system for a fixed time. Afterward, you measure how much water each can collected. The differences show which spots are receiving too much or too little water, giving you a clear map of distribution uniformity. This lets you adjust nozzles, spacing, pressure, or cycling to even things out. A flow meter adds another layer by quantifying the actual water flow, helping verify the system is delivering the intended volume and identifying zones with mismatched flow.

The other options aren’t about how evenly water lands across the area. Soil pH testing, leaf nutrient testing, or a tensiometer reading focus on soil chemistry, plant nutrients, or soil moisture status, respectively, rather than the spatial distribution of irrigation.