Record Display for the EPA National Library Catalog


Main Title Some Techniques for the Measurement of Plant and Soil Water Potentials with Thermocouple Psychrometers.
Author Nimlo, Thomas J. ; Eddlema, Lee E. ; Seele, Charles ; Jone, James M. ;
CORP Author Montana State Univ., Bozeman. Water Resources Research Center.
Year Published 1971
Report Number Rept. ;no. 14; DI-14-31-0001-3026; OWRR-A-039-MONT; 07836,; A-039-MONT(1)
Stock Number PB-199 037
Additional Subjects ( Soil water ; Measurement) ; ( Plants(Botany) ; Water content) ; Humidity ; Thermocouples ; Psychrometers ; Plant growth ; Thermocouple psychrometers ; Psychrometers
Library Call Number Additional Info Location Last
NTIS  PB-199 037 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 30p
Studies of soil water-plant growth relationships have been hampered by the lack of an accurate, rapid method for the measurement of the tension (potential) water is under in the plant and in the soil. Recently a new method, called the thermocouple psychrometer technique has been developed whereby these measurements can be made. Thermocouple psychrometry is based on the assumption that the relative humidity near a leaf surface or in a soil mass reflects the water potential of that leaf or soil. The techniques involve measuring the relative humidity in or near a plant or soil system with ultra-fine thermocouples which, by employing the Peltier effect, can be made to function as psychrometers. The measurement of soil moisture stress with the thermocouple psychrometer is very rapid and relatively easy. (Author)