What is the main purpose of sensors in irrigation systems?

• A. To manually control valve operation
• B. To provide feedback for automated watering
• C. To increase the system's voltage
• D. To connect water supply lines

Answer: (B)

The main purpose of sensors in irrigation systems is to provide feedback for automated watering. Sensors play a critical role in optimizing irrigation practices by detecting various environmental conditions such as soil moisture levels, temperature, and rainfall. This information allows the irrigation system to automatically adjust its watering schedule and duration, ensuring that plants receive the right amount of water based on their specific needs and the current weather conditions.

By utilizing sensors, irrigation systems can reduce water waste and promote efficient water use, which is essential in water-scarce regions. Automated feedback from sensors helps maintain plant health, prevents overwatering or underwatering, and can significantly lead to water conservation efforts, aligning with the principles of water-efficient landscaping.

Other options do not align with the primary function of sensors in irrigation systems. For example, manually controlling valve operation does not leverage the automation benefits that sensors provide. Similarly, increasing the system's voltage or connecting water supply lines are functions that do not relate to the efficient management of watering processes, which is the focus of using sensors in this context.