Crop Water Stress Index is a means of irrigation scheduling and crop water stress quantification based on canopy temperature measurements and prevailing meteorological conditions. Plant temperature is an indicator of plant water status because stomata close in response to soil water depletion causing a decrease in water uptake and an increase in leaf temperature.
Precise measurements, particularly canopy temperature, are required. Apogee Infrared Radiometers have been used by Dr. Suat Irmak, of the University of Nebraska, in his CWSI research.
Using infrared radiometers to determine water schedule for plants.
Apogee Sensors Used
Dr. Suat Irmak of the University of Nebraska