Suited to applications where water stress and irrigation needs have to be monitored. Slow reaction time. Source of water during soil drying. Require maintenance to refill after dry periods. I have not kept up on this discussion, but I do recall a good bit of amendment with manure which may have served to create air pockets in the soil.
Typical usage is in multiple arrays, automatically recorded by a field data logger.
Suppliers index . SoilMoisture Equipment Corporation . The Original American Suppliers since 1951. They also produce the Watermark sensor. Suppliers index .