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This article in AJ

  1. Vol. 59 No. 5, p. 494-496
     
    Received: Apr 18, 1967
    Published: Sept, 1967


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doi:10.2134/agronj1967.00021962005900050040x

Effect of Viewing Angle on Canopy Temperature Measurements with Infrared Thermometers1

  1. M. Fuchs,
  2. E. T. Kanemasu,
  3. J. P. Kerr and
  4. C. B. Tanner2

Abstract

Abstract

Crop surface temperatures were measured with infrared thermometers at various viewing angles and for a range of solar zenith angles. The temperature readings of crops with continuous and uniform canopies were not related to the above angles. In the case of open row crops, the side of the row facing the sun was 1 to 3 C warmer than the shaded side.

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