Like this low-power soil sensor project and the custom controller for six soil sensors, [rbaron’s] w-parasite uses a “parasitic capacitive” moisture sensor to determine if it’s time to ...

To make a long story short, the commercial system by Hunter (Soil-Clik) appears to be a tensiometer-based system that uses the pressure produced by moisture intrusion into the measurement column.

Monnit launches its new ALTA® Soil Moisture Sensor to alert you on your mobile device or computer how much, when, and where to water your crops.

Soil Moisture Measurement and Sensor Calibration Publication Trend The graph below shows the total number of publications each year in Soil Moisture Measurement and Sensor Calibration.