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This article in SSSAJ

  1. Vol. 31 No. 2, p. 161-164
    Received: Aug 8, 1966
    Accepted: Nov 18, 1966

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The Measurement of Water Loss by Mesquite (Prosopis glandulosa var. glandulosa Torr.) Using the Thermoelectric Method1

  1. C. W. Wendt,
  2. J. R. Runkles and
  3. R. H. Haas2



The quantitative aspects of the thermoelectric method were investigated in a controlled environment chamber using mesquite (Prosopis glandulosa var. glandulosa Torr.). A high degree of correlation for trees less than 10 mm in diameter (r = 0.97) was obtained between water transpired and the product of the cross-sectional area of the stem and the relative sap velocity. As the size of trees increased the correlation decreased due to variations in relative sap velocities around the circumference of larger trees. Although the correlation coefficient was high for trees less than 10 mm in diameter, the coefficient of variation was 15.6% which was probably due to the variation in the moisture content of the plants.

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