Abstract
Development of techniques for in situ field measurement of leaf water potential using thermocouple psychrometers highlight the need for an accurate analysis of the errors associated with such measurements. The major sources of error arise from random calibration errors, the temperature dependence of the calibration relationship, temperature differences between the leaf and the psychrometer sensing junction and the error in reading the psychrometer output voltage. In an analysis of such errors, using insulated field‐calibrated psychrometers, the major source of error was found to be in the calibration relationship, particularly as temperature decreased and approached the value of the calibration intercept. This resulted in total relative error values of 8 to 10% of the measured water potential at 0°C, whereas the error was less than 4% for temperatures greater than 20°C (for a potential of —1250 kPa).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
