Which irrigation planning approach uses weather data, soil moisture, and plant water use to determine irrigation needs?

• A. Moisture Based
• B. Base Schedule
• C. Water Budget
• D. Synthetic Turf

Answer: (C)

Water budget irrigation planning balances the soil’s stored water with the crop’s demand, using weather data, soil moisture, and plant water use to decide when and how much to irrigate. Weather data helps estimate how much water the crop would lose through evapotranspiration under current conditions. Soil moisture measurements tell you how much water is actually stored in the root zone right now. Plant water use reflects how aggressively the crop is consuming water, which can vary with temperature, humidity, and growth stage. Putting these together, you determine the deficit between what the soil can hold and what the plant needs, and irrigation is applied to restore soil moisture to a target level. This integrated approach reduces both overwatering and underwatering because it responds to real-time conditions rather than just a fixed schedule or single-factor triggers.

Moisture-based plans focus mainly on soil moisture status alone. Base schedules rely on a fixed timetable, not current soil or weather conditions. Synthetic turf is not an irrigation planning method.