Which item is included in the factors for determining proper low-volume application?

• A. Plant root zone
• B. Color of mulch
• C. Time of day
• D. Wind speed

Answer: (A)

Focusing on the root zone is essential when sizing and scheduling low-volume irrigation because this approach places water directly where roots can use it. The root zone defines how much water the soil can store and how deep water must penetrate to reach active roots. By understanding root depth, soil texture, and how the plant exploits water, you determine the appropriate emitter flow, spacing, and cycle-and-soak duration to meet the plant’s needs without waste or stress.

Mulch color doesn’t influence water delivery in low-volume systems, and while time of day and wind speed can affect evaporation in other systems, they’re not the primary factors for determining proper low-volume application.