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Many techniques have been proposed in recent years for insitu soil characterization, and among them, acoustic methods have been revealed to be particularly promising. These methods are based on measurements of the propagation velocities of seismic, sonic, and ultrasonic waves. However, in granular and porous mediums, velocities depend on the state of the saturation of the soil in a complex and not...
In this paper the design and the development of an innovative soil moisture sensor for agricultural applications is presented; also the first experimental results are illustrated and compared with those deriving by the underlying theory. The basic idea is to excite the soil with seismic waves (both compressional and shear ones) and to measure their velocity of propagation using a transmitter and a...
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