Photogrammetric Engineering & Remote Sensing · 1978 · 32 citations · 0 references
AgricultureCrop SciencesPlant SciencesCrop PhysiologyCrop SensingIrrigation ManagementCanopy SensingCrop MicroclimateCrop Stress DetectionCrop Water RequirementsPlant Stress DetectionRemote Sensing For Crop ManagementCanopy Temperature-based Stress AssessmentCanopy Water Stress DetectionCrop Canopy VariabilityCrop Stress AssessmentCrop Water StressWater Stress DetectionWater Stress MonitoringWithin-canopy Temperature
An airborne thermal scanner was used to measure the temperature of a wheat crop canopy in Phoenix, Arizona. The results indicate that canopy temperatures acquired about an hour and a half past solar noon were well correlated with presunrise plant water tension, a parameter directly related to plant growth and development. Pseudo-colored thermal images reading directly in stress degree days, a unit indicative of crop irrigation needs and yield potential, were produced. The aircraft data showed significant within-field canopy temperature variability, indicating the superiority of the synoptic view provided by aircraft over localized ground measurements. The standard deviation between airborne and ground-acquired canopy temperatures was 2 C or less.