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Soil Science Society of America Journal Abstract -

Psychrometric Measurement of Soil Water Potential without Precise Temperature Control1


This article in SSSAJ

  1. Vol. 31 No. 3, p. 297-301
    Received: Oct 18, 1966
    Accepted: Nov 30, 1966

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  1. S. L. Rawlins and
  2. F. N. Dalton2



A theoretical analysis shows that by imposing certain boundary conditions it should be possible to eliminate the major effects of temperature fluctuation on psychrometric measurements of soil water potential. Tests on a psychrometer constructed to meet these boundary conditions were carried out on a soil column in a greenhouse. Although diurnal fluctuation of soil temperature was as great as 5C, water potential was measured with an apparent accuracy of ±0.5 bars throughout two irrigation cycles.

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