Which irrigation type is capable of achieving higher uniformity of coverage than overhead irrigation?

• A. Fixed Spray Irrigation
• B. Rotating Sprinklers
• C. Drip Irrigation
• D. Surface Irrigation

Answer: (C)

Drip irrigation is considered to achieve higher uniformity of coverage compared to overhead irrigation methods. This is primarily because drip irrigation delivers water directly to the root zone of plants through a network of tubes and emitters, minimizing water loss due to evaporation and runoff. When water is applied directly to the soil at a slow rate, it allows for better absorption, leading to more consistent moisture levels across the area being irrigated.

In contrast, overhead irrigation methods, such as fixed spray irrigation and rotating sprinklers, apply water from above the plants and can lead to uneven distribution due to factors like wind drift, evaporation, and varying nozzle performance. Surface irrigation, while it can also be efficient under certain conditions, depends heavily on the topography and soil type, making it less reliable for uniform distribution compared to drip systems.

Overall, drip irrigation's targeted approach allows for greater efficiency in both water use and coverage, which is vital in water-efficient landscaping practices.