SSSAJ Journal of Natural Resources and Life Sciences Education
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Published in Soil Sci Soc Am J 35:671-674 (1971)
© 1971 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Comparison of the Calorimetric and Flux Meter Measurements of Soil Heat Flow1

R. J. Hanks2 and H. S. Jacobs3

ABSTRACT

Comparisons of soil heat flow as estimated by the calorimetric, flux meter, and a combination of the two methods were made during the summer of 1969 in an oat field (Avena sativa L.). Error analysis indicated the calorimetric method had a smaller relative error than the combination method for daily soil heat flow measurements. The relative error for hourly and part-day measurements was about the same. Daily or part-day integrated heat flow averaged over 30 days was 24% higher for the flux meter alone than the calorimetric measurement. The combination method yielded average daily estimates that were about 65% higher than the calorimetric method. Calorimetric measurements to 16 cm and 32 cm yielded daily average values that were slightly lower than calorimetric measurements made to 64 cm. Hourly comparisons showed the correlation coefficient of the calorimetric and combination methods to be 0.97, and of the calorimetric and heat flux meter methods to be 0.93.

NOTES

1 Contribution from Dept. of Soils & Meteorology Utah State University Agr. Exp. Sta., Logan, Utah. Journal Paper no. 1110.

2 Professor, Utah State University.

3 Former Post-doctorate Fellow, Utah State University (now Director Evapotranspiration Laboratory, Kansas State University, Manhattan, Kansas).

Received for publication January 21, 1971. Accepted for publication June 23, 1971.






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Copyright © 1971 by the Soil Science Society of America.