Summary
Soil water potential is measured either by measuring some property of the soil which changes with the water potential, or by equilibrating the liquid or gas phase of the water in some reference medium with the liquid phase of the soil and measuring some property of the water in the reference medium. Devices commonly used to measure soil water potential are tensiometers, thermocouple psychrometers, electrical resistance sensors, thermal conductivity sensors, and correlations with water contents of the soil or of filter paper which has been equilibrated with the soil. The principles governing the operation of each of these devices will be discussed.
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References
Al Kafaf S, Hanks RJ (1974) Evaluation of the filter paper method for estimating soil water potential. Soil Sci 117:194
Al Nakshabandi G, Kohnke H (1965) Thermal conductivity and diffusivity of soils as related to moisture tension and other physical properties. Agric Meteorol 2:271
Bowers SA, Hanks J (1965) Reflection of radiant energy from soils. Soil Sci 100:130
Briggs LJ (1950) Limiting negative pressure of water. J Appl Phys 21: 721
Campbell GS (1985) Soil physics with BASIC: transport models for soil-plant systems. Elsevier, New York
Campbell GS, Gee GW (1986) Water potential: miscellaneous methods. Agronomy 9(part l, 2nd edn):619
Cassell DK, Klute A (1986) Water potential: tensiometry. Agronomy 9 (part l, 2nd edn): 563
Gardner R (1937) A method of measuring the capillary tension of the soil moisture over a wide moisture range. Soil Sci 43:277
Gupta SC, Hanks RJ (1972) Influence of water content on electrical conductivity of the soil. Soil Sci Soc Am Proc 36:855
Hamblin AP (1981) A filter paper method for routine measurement of field water potential. J Hydrol 53:355
Idso SB, Jackson RD, Reginato RJ, Kimball BA, Nakayama FS (1975) The dependence of bare soil albedo on soil water content. J Appl Meteorol 14:109
Kano Y, McClure WF, Skaggs RW (1985) A near infrared reflectance soil moisture meter. Trans ASAE 28:1852
Klute A (1986) Water retention: laboratory methods. Agronomy 9 (part l, 2nd edn):635
Madsen HB, Jensen CR, Boysen R (1986) A comparison of the thermocouple psychrometer and the pressure plate methods for determination of soil water characteristic curves. J Soil Sci 37:357
McInnes K (1981) Thermal conductivities of soils from dryland wheat regions in Eastern Washington. MS Thesis, Washington State University, Pullman
Mulla DJ, Low PF, Roth CB (1985) Measurement of the specific surface are of clays by internal reflectance spectroscopy. Clays Clay Miner 33:391
Oster JD, Rawlins SL, Ingvalson RD (1969) Independent measurement of matric and osmotic potential of soil water. Soil Sci Soc Am Proc 33:188
Peck AJ, Rabbidge RM (1966) Soil-water potential: direct measurement by a new technique. Science 151:1385
Phene CJ, Hoffman GJ, Rawlins SL (1971) Measuring soil matric potential in situ by sensing heat dissipation within a porous body: I. Theory and sensor construction. Soil Sci Soc Am Proc 35:27
Rawlins SL, Campbell GS (1986) Water potential: thermocouple psychrometry. Agronomy 9(part 1, 2nd edn):597
Rawlins SL, Dalton FN (1967) Psychrometric measurement of soil water potential without precise temperature control. Soil Sci Soc Am Proc 31:297
Richards LA (ed) (1954) Diagnosis and Improvement of Saline and Alkali Soils. USDA Agriculture Handbook 60
Richards LA, Ogata G (1958) Thermocouple for vapor-pressure measurement in biological and soil systems at high humidity. Science 128:1089
Scholl DG (1978) A two-element ceramic sensor for matric potential and salinity measurements. Soil Sci Soc Am J 42:429
Skidmore EL, Dickerson JD, Schimmelpfennig H (1975) Evaluating surface-soil water content by measuring reflectance. Soil Sci Soc Am Proc 39:238
Spanner DC (1951) The Peltier effect and its use in measurement of suction pressure. J Exp Bot 11:145
Spanner DC (1972) Plants, water and some other topics. In: Brown RW, Van Haveren BP (eds) Psychrometry in water relations research. Utah Agric Exp Stn, Logan, p 29
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Campbell, G.S. Soil water potential measurement: An overview. Irrig Sci 9, 265–273 (1988). https://doi.org/10.1007/BF00296702
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DOI: https://doi.org/10.1007/BF00296702