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Published online 26 May 2006
Published in Vadose Zone J 5:751-756 (2006)
DOI: 10.2136/vzj2005.0114
© 2006 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Comparing Ambient Temperature Effects on Heat Pulse and Time Domain Reflectometry Soil Water Content Measurements

Ole K. Olmansona and Tyson E. Ochsnerb,*

a Dep. of Soil, Water, and Climate, Univ. of Minnesota, St. Paul, MN 55108
b USDA-ARS, Soil and Water Management Research Unit, St. Paul, MN 55108

Figure 1
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  		Fig. 1. Heat pulse and TDR soil moisture estimation in Ida silt loam and Hanlon sand with an actual water content of 0.11 m3 m–3. Lines represent weighted linear regression. Symbols represent the mean of three replicates, and error bars represent one standard deviation.

 

Figure 2
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  		Fig. 2. Heat pulse and TDR soil moisture estimation in Ida silt loam with an actual water content of 0.36 m3 m–3 and Hanlon sand with an actual water content of 0.32 m3 m–3. Lines represent weighted linear regression. Symbols represent the mean of three replicates, and error bars represent one standard deviation.

 

Figure 3
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  		Fig. 3. Corrected and uncorrected water content estimates using the TDR method in Ida silt loam with an actual water content of 0.36 m3 m–3 and Hanlon sand with and actual water content of 0.32 m3 m–3. Lines represent weighted linear regression.

 

Figure 4
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  		Fig. 4. Corrected and uncorrected water content estimates using the heat pulse method in Ida silt loam with an actual water content of 0.36 m3 m–3 and Hanlon sand with and actual water content of 0.32 m3 m–3. Lines represent weighted linear regression.

 




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