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Airborne monitoring of crop canopy temperatures for irrigation scheduling and yield predictionThe aim of the program discussed was to develop techniques for remotely measuring crop irrigation needs and predicting crop yields, with emphasis on wheat. Airborne measurements, using an IR line scanner and color IR photography, were made to evaluate the feasibility of measuring minimum and maximum (dawn and afternoon) crop temperatures to compute a parameter, termed 'stress degree day' (SDD) - a valuable indicator of crop water needs, which can be related to irrigation scheduling and yield. Crop canopy temperature measurements by airborne IR techniques revealed the superiority of thermal IR data over color IR photography. Water stress undetected in the latter technique was clearly detected in thermal imagery. Color IR photography, however, is valuable in discerning vegetation. The pseudo-colored temperature-difference images (and pseudo-colored images, reading directly in daily SDD increments) are shown to be well suited for assessing plant water status and, thus, for determining the irrigation needs and crop yield potentials.
Document ID
19780030988
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Millard, J. P.
(NASA Ames Research Center Moffett Field, Calif., United States)
Jackson, R. D.
(NASA Ames Research Center Moffett Field, CA, United States)
Reginato, R. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Idso, S. B.
(U.S. Department of Agriculture, Agricultural Research Service, Phoenix Ariz., United States)
Goettelman, R. C.
(LFE Corp. Richmond, Calif., United States)
Lapado, R. L.
(ESL, Inc. Sunnyvale, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: International Symposium on Remote Sensing of Environment
Location: Ann Arbor, MI
Start Date: April 25, 1977
End Date: April 29, 1977
Accession Number
78A14897
Distribution Limits
Public
Copyright
Other

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