What is a significant consideration regarding the time of day to operate an irrigation system?

• A. Plant colors change at different times
• B. To minimize evaporation losses
• C. To avoid water restrictions
• D. To synchronize with weather patterns

Answer: (B)

Operating an irrigation system during the early morning or late afternoon is crucial to minimize evaporation losses. During these times, the temperatures are generally cooler, and humidity levels are higher. This reduces the amount of water that evaporates before it reaches the soil and plants, ensuring that more water is available for the plants' root systems.

If irrigation is scheduled during the hottest parts of the day, a significant portion of the water applied can be lost to evaporation, resulting in less efficient irrigation and increased water usage. Proper timing not only promotes healthier plant growth but also contributes to water conservation efforts, which is a core principle of water-efficient landscaping practices.

Other considerations, such as avoiding water restrictions or synchronizing with weather patterns, may be important, but minimizing evaporation significantly enhances the effectiveness and efficiency of irrigation systems.