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Published in Soil Sci Soc Am J 60:1036-1039 (1996)
© 1996 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Field Measurement of Air-Entry and Water-Entry Soil Water Pressure Heads

D. J. Fallow and D. E. Elrick*

Department of Land Resource Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1

*Corresponding author (delrick{at}lrs.uoguelph.ca).

ABSTRACT

An effective field measurement of the air-entry and water-entry soil water pressure heads gives an improved description of the hydraulic properties of soils. One study obtained measurements of air-entry soil water pressure heads using a modified falling head infiltrometer. This study then estimated the value of the water-entry soils water pressure head from this value. Now direct field measurements of both the air-entry and water-entry soils water pressure heads can be easily obtained using an external tension bottle attached to the Guelph Pressure Infiltrometer at the conclusion of quasi-steady state infiltration readings.

Received for publication May 29, 1995.


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Copyright © 1996 by the Soil Science Society of America.