Measurement of Soil Water Content with Dielectric Dispersion Frequency

Simultaneous Measurement of Soil Water Content and Salinity Using a Frequency-Response Method

where ε equals permittivity, εr equals relative permittivity, ε0 equals permittivity of free space (8.85 10 12 F Laboratory tests were conducted to simultaneously measure soil m 1), ε r equals dielectric constant (the real part of relawater content and salinity using a four-electrode Wenner array sensor. The sensor was modified to enhance the capacitive effect. Soil bulk tive permittivity), ε′′...

Non-linearity of Soil Dielectric Constant as a Function of Radar Frequency and Soil Moisture Content

Soil is a mixture of four components: air, free water, bound water and soil particles. The microwave dielectric constant of soil is strongly dependent on the soil moisture content. The dielectric constant is a measure of the response of a material to an applied electric field, such as an electromagnetic wave. It has a real and an imaginary component. Soil particles’ dielectric constant depends ...

Dielectric properties of low-water-content tissues.

The dielectric properties of two low-water-content tissues, bone marrow and adipose tissue, were measured from 1 kHz to 1 GHz. From 1 kHz to 13 MHz, the measurements were performed using a parallel-plate capacitor method. From 10 MHz to 1 GHz, a reflection coefficient technique using an open-ended coaxial transmission line was employed. The tissue water contents ranged from 1 to almost 70% by w...

Rapid measurement of soil water by gravimetric method

Soil Dielectric Model Accounting for Contribution of Bound Water Spectra through Clay Content

In this paper, there was studied correlation of dielectric predictions for moist soils with the measured values, regarding the well known and prevalent in common usage semiempirical mixing dielectric model (SMDM) proposed by M. C. Dobson et al., on the one hand, and the generalized refractive mixing dielectric model (GRMDM) proposed by V. L. Mironov et al., on the other hand. The analysis is ba...