HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Rawlins, S. L. Articles by Dalton, F. N. Search for Related Content PubMed Articles by Rawlins, S. L. Articles by Dalton, F. N. Agricola Articles by Rawlins, S. L. Articles by Dalton, F. N.

Psychrometric Measurement of Soil Water Potential without Precise Temperature Control¹

ABSTRACT

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.

¹ Contribution from the US Salinity Laboratory, Soil and Water Conserv. Res. Div., ARS, USDA, Riverside, Calif. 92502. This work was supported in part by the Atmospheric Sciences Laboratory, Res. Div., US Army Electronics Command, Fort Huachuca, Ariz.

² Research Soil Scientist and Physicist, respectively.

Received for publication October 18, 1966. Accepted for publication November 30, 1966.