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This article in AJ

  1. Vol. 63 No. 1, p. 33-36
     
    Received: Apr 10, 1970


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doi:10.2134/agronj1971.00021962006300010012x

Effects of Irrigation Water Temperature on Soil Temperature1

  1. P. J. Wierenga,
  2. Robert M. Hagan and
  3. E. J. Greogory2

Abstract

Abstract

Soil temperatures were measured in fields irrigated with normal and cold water and in unirrigated soil, to study the effects of irrigation water temperature on soil temperature. Temperatures were measured with probes made of thermocouple wire enclosed in 3 mm O.D. stainlesssteel tubing. The probes were inserted vertically into the soil. Errors in temperature measurement resulting from heat conduction along the probes were on the order of 0.1 C or less. The effects of irrigation water temperature on soil temperature were small and of short duration. Differences in soil temperature resulting from irrigation with water of 27 and 14 C lasted for less than 24 hours at 5 and 10 cm, and for 60 hours at 30 cm. Irrigated soil temperatures were significantly reduced by evaporative cooling from the soil surface after irrigation in mid-April, though not in mid-February.

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