Which practice most directly improves irrigation efficiency?

• A. Proper sizing and maintenance of control valves to ensure uniform water application.
• B. Increasing total water supply
• C. Removing all meters
• D. Running all zones simultaneously

Answer: (A)

Proper sizing and maintenance of control valves to ensure uniform water application directly improves irrigation efficiency. Valves control how much water each zone receives and at what pressure, so when they’re correctly sized and well maintained, the flow to every area matches the system’s design. This leads to consistent distribution across the landscape, so no spot is overwatered or undervalued due to pressure inconsistencies or valve leaks. When valves fit and operate as intended, water is applied precisely where needed, reducing losses from runoff, deep drainage, and uneven sprinkler or emitter performance.

Increasing total water supply, removing meters, or running all zones at once don’t address how water is actually distributed. Simply adding more water doesn’t fix inefficiencies in delivery; removing meters loses the feedback needed to manage usage; and running every zone together defeats zone-specific scheduling and can cause overwatering in some areas while others remain dry.