What is the primary function of sensors and weather stations in irrigation management?

• A. Adjust soil pH automatically
• B. Increase water hardness
• C. Filter chlorides
• D. Provide data and automate irrigation decisions

Answer: (D)

Sensors and weather stations gather real-time data on soil conditions and the environment, then feed that information into irrigation systems to decide when and how much water to apply. By measuring soil moisture, temperature, and sometimes salinity, alongside weather data like rainfall, temperature, humidity, wind, and solar radiation, the system can estimate how quickly plants are using water (evapotranspiration) and how much soil water remains available. This lets the irrigation controller automate scheduling so water is applied only when needed and stopped when targets are reached, improving efficiency and reducing waste. The other options relate to changing water chemistry or filtration, which isn’t the primary role of these devices in irrigation management.