Evaluation of the infrared thermometer as a crop stress detector

P. Berliner, D. M. Oosterhuis, G. C. Green

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

The features of the energy balance of a canopy relevant to infrared thermometry are presented. Results of a field experiment carried out with differentially water-stressed plots showed that changes of instantaneous horizontal wind speed (as measured with a modified three-cup anemometer) affect canopy temperature (CT) readings. This needs to be taken into consideration when using CT to monitor crop water status. The merits of various stress indices based on CT measurements are discussed. The difference in CT between plots was found to be well correlated with their respective leaf water potential or stomatal resistance differences. Comparison of the measured CT with that of a wellwatered reference plot was shown to provide a potentially reliable means of detecting crop water stress.

Original languageEnglish
Pages (from-to)219-230
Number of pages12
JournalAgricultural and Forest Meteorology
Volume31
Issue number3-4
DOIs
StatePublished - 1 Jan 1984
Externally publishedYes

ASJC Scopus subject areas

  • Forestry
  • Global and Planetary Change
  • Agronomy and Crop Science
  • Atmospheric Science

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