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This article in SSSAJ

  1. Vol. 35 No. 5, p. 665-667
     
    Received: Feb 9, 1971
    Published: Sept, 1971


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doi:10.2136/sssaj1971.03615995003500050015x

Soil Temperature Estimation by a Numerical Method1

  1. R. J. Hanks,
  2. D. D. Austin and
  3. W. T. Ondrechen2

Abstract

Abstract

A numerical method for computing soil temperature as a function of time and depth was devised. The method allows for variable soil properties as a function of depth and requires measurement of soil temperature at or near the soil surface. Computed and measured soil temperatures agreed within 1.0C when actual soil thermal properties were used for the computation. Computed and measured soil temperatures agreed within 1.5C when soil thermal diffusivity was assumed constant at 0.20 cm2 min-1. Actual values varied with depth from 0.21 to 0.29. Where the thermal diffusivity was assumed uniform at 0.45 cm2 min-1, temperature errors grew from 1.0–1.7C after 3 days to 1.7–3.1C after 6 days.

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