Soil moisture sensors are devices used to measure the amount of water present in the soil. They help farmers and gardeners determine when to water their plants, ensuring optimal growth and preventing overwatering. These sensors can be installed in the ground and provide real-time data on soil moisture levels. There are various types of soil moisture sensors, including tensiometers and capacitance sensors. Tensiometers measure the tension or suction of water in the soil, while capacitance sensors use electrical properties to gauge moisture content. Both types contribute to efficient water management in agriculture and landscaping.