CS616 and CS625 Water Content Reflectometers
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4
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1
1
2
linear/quadratic cal differences
CS616/CS625 output period (microseconds)
linear - quadrati
c (%VWC)
VWC10percent
VWC40percent
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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Summary of Contents for CS616
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Page 8: ...Table of Contents iv ...
Page 50: ...CS616 and CS625 Water Content Reflectometers 42 ...
Page 52: ...Appendix A Discussion of Soil Water Content A 2 ...
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