Plant moisture stress: a portable freezing-point meter compared with the psychrometer

Journal Article · · Agron. J.; (United States)

DOI:https://doi.org/10.2134/agronj1969.00021962006100020038x· OSTI ID:5518657

Cary, J W; Fisher, H D

A small portable instrument for measuring the freezing-point depression of plant tissue has been developed for field use. The instrument is easy to operate and can be constructed from materials costing less than $100. Moisture stress measurements made with the freezing-point meter on a variety of plants were compared with vapor pressure psychrometer measurements. Variation between duplicates in the freezing point averaged 1.2 bars, but differences between stress measurements made with the psychrometer and freezing-point instrument averaged 2.6 bars. 11 references, 5 figures, 2 tables.

• Research Organization: Snake River Conservation Research Center, Kimberly, ID
• OSTI ID: 5518657
• Journal Information: Agron. J.; (United States), Vol. 61
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
MELTING POINTS
MEASURING METHODS
METERS
DESIGN
PLANT TISSUES
FREEZING
BIOLOGICAL STRESS
CRYOSCOPY
MOISTURE
PSYCHROMETRY
BODY
HYGROMETRY
MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TISSUES
TRANSITION TEMPERATURE
560203* - Thermal Effects- Plants- (-1987)