What is the primary function of irrigation valves?

• A. Filter water entering a zone.
• B. Create multiple watering zones within a system.
• C. Measure soil moisture.
• D. Inject fertilizer.

Answer: (B)

Valves act as the gates that control water flow to different parts of an irrigation system. By opening and closing individual valves, a single supply line can be split into multiple zones, each with its own sprinkler heads and schedule. This zoning lets you tailor irrigation to varying plant water needs, soil types, and sun exposure, improving both efficiency and uniformity. Other functions listed are handled by different devices: a filter cleans incoming water, a soil moisture sensor measures moisture, and a fertilizer injector delivers nutrients—none of these are the primary job of the valves, which is to create and manage separate watering zones.