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Establishing crop water stress index (CWSI) threshold values for early, non-contact detection of plant water stress

, : Establishing crop water stress index (CWSI) threshold values for early, non-contact detection of plant water stress. Transactions of the ASAE 45(3): 775-780

Early, non-contact, non-destructive, and quantitative detection of plant water stress with the application of infrared thermometry using a crop water stress index (CWSI) was established. A CWSI model for plants grown under controlled environments was developed using thermodynamic principles and energy balance of the plant. CWSI threshold values were established with a parametric approach. The effectiveness of the sensing technique was evaluated using timing of the stress detection by a grower.


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