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  2. Soil moisture sensor - Wikipedia

    en.wikipedia.org/wiki/Soil_moisture_sensor

    A simple soil moisture sensor for gardeners. Soil moisture sensors measure the volumetric water content in soil. [1] Since the direct gravimetric measurement of free soil moisture requires removing, drying, and weighing of a sample, soil moisture sensors measure the volumetric water content indirectly by using some other property of the soil, such as electrical resistance, dielectric constant ...

  3. Irrigation controller - Wikipedia

    en.wikipedia.org/wiki/Irrigation_controller

    Most automatic irrigation valves are diaphragm valves in which the water above the diaphragm must be discharged for the valve to open. In a hydraulic system, the controller and valves are connected via small plastic tubes approximately 4 mm (¼ in) in diameter. The controller opens the tube connected to the valve, allowing that valve to open.

  4. Leaf sensor - Wikipedia

    en.wikipedia.org/wiki/Leaf_sensor

    Precision irrigation monitoring using the SG-1000 leaf sensor and commercial data loggers for irrigation control has been achieved in recent years. [12] Researchers have found a direct correlation between leaf thickness and Relative Water Content (RWC) of plant leaves using the SG-1000 Leaf Sensor under field conditions.

  5. TDR moisture sensor - Wikipedia

    en.wikipedia.org/wiki/TDR_moisture_sensor

    The sensor contains a waveguide consisting of two, three, or more parallel wires which is connected via a coaxial cable to a voltage pulse generator which sends precisely defined voltage pulses into the sensor. As the pulse travels along the waveguide its progress varies depending on the moisture content of the material being examined.

  6. Soil moisture sensors - Wikipedia

    en.wikipedia.org/?title=Soil_moisture_sensors&...

    Pages for logged out editors learn more. Contributions; Talk; Soil moisture sensors

  7. Precision agriculture - Wikipedia

    en.wikipedia.org/wiki/Precision_agriculture

    Moisture sensors [55] in the soil determine the best times to remotely water plants. The irrigation systems can be programmed to switch which side of tree trunk they water based on the plant's need and rainfall. [46] Innovations are not just limited to plants—they can be used for the welfare of animals.