A smartphone app estimates soil moisture from acoustic reflections during a vertical scan and reports 2.39% MAE in outdoor tests without soil disturbance or per-location calibration.
1974.Dielectric properties of soils as a function of moisture content
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SoilSound: Smartphone-based Soil Moisture Estimation
A smartphone app estimates soil moisture from acoustic reflections during a vertical scan and reports 2.39% MAE in outdoor tests without soil disturbance or per-location calibration.