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CS616 and CS625 Water Content Reflectometers

FIGURE 7-3. Difference in % volumetric water content between linear

and quadratic forms of calibrations

The linear and quadratic coefficients for the sandy clay loam data in FIGURE

7-3 follow and can be used in similar soils.

TABLE 7-2. Calibration coefficients for sandy clay loam with bulk density 1.6 g cm

-3

and

electrical conductivity at saturation 0.4 dS m

-1

for both linear and quadratic forms.

Linear Quadratic

C0 C1 C0 C1 C2

–0.6200 0.0329 0.0950 –0.0211 0.0010

TABLE 7-3. Calibration coefficients for sandy clay loam with bulk density 1.6 g cm

-3

and

electrical conductivity at saturation 0.75 dS m

-1

for both linear and quadratic forms.

Linear Quadratic

C0 C1 C0 C1 C2

–0.4470 0.0254 –0.0180 –0.0070 0.0006

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