What is a key consideration to minimize evaporation during overhead irrigation?

• A. Water during peak heat hours
• B. Irrigate during windy conditions
• C. Irrigate in the morning or evening
• D. Water plants every day

Answer: (C)

Irrigating in the morning or evening is crucial for minimizing evaporation during overhead irrigation because temperatures are typically cooler during these times. This means that less water will be lost to evaporation compared to irrigating during the hotter parts of the day, such as midday. When the sun is at its peak, the heat rapidly evaporates water sprayed from sprinklers, leading to inefficiency in water use and potentially leaving plants under-watered.

By watering in the early morning or later in the evening, the water has a greater chance of soaking into the soil and being absorbed by plant roots before it evaporates. This practice not only conserves water but also promotes healthier plant growth by ensuring they receive the moisture they need without excessive loss.

In contrast, watering during peak heat hours or windy conditions increases evaporation rates and reduces the effectiveness of irrigation efforts. Watering daily can also lead to waterlogged soil and may not allow for deep root growth, which is vital for plant health. Thus, choosing the right times to water plays a significant role in water efficiency and landscape sustainability.