. Physiological measurements were taken at midday (1130 to 1330 hr ) on the outer canopy of the trees in direct sunlight at a height of ≈180 cm on fully mature leaves. Canopy temperatures were measured with an infrared thermometer (model 39800; Cole Palmer
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Tamara Wynne and Dale Devitt
Alexander Levin and Lloyd Nackley
agricultural systems, assessing leaf temperature as a proxy for water stress began in the 1960s ( Maes and Steppe, 2012 ) and has recently been popularized because of a proliferation of thermal cameras, infrared thermometers [IRTs ( Fig. 2C )], and remote
( Vaccinium macrocarpon Ait.). An experiment was set on five commercial cranberry beds to measure plant canopy temperature using infrared thermometers, air temperature, relative humidity and other weather related measurements, soil moisture content, soil