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Remote sensing of St. Augustine Decline (SAD) diseaseLaboratory and field spectral reflectance measurements of healthy and infected St. Augustine grass were made using several different instruments. Spectral differences between healthy and infected grass occured in the visible and near infrared regions. Multiband and color infrared photographs were taken of healthy and diseased turf from ground-based platforms and low altitude aircraft. Qualitative (density slicing) and quantitative (transmission densitometry) analyses revealed distinct tonal differences between healthy and St. Augustine disease (SAD) infected grass. Similar experiments are described for determining if healthy and diseased grass can be distinguished from waterstressed grass and grass deficient in either nitrogen or iron.
Document ID
19770010605
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Odle, W. C. (Texas A&M Univ. College Station, TX, United States)
Date Acquired
September 3, 2013
Publication Date
August 1, 1976
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
TR-RSC-77
NASA-CR-149586
Accession Number
77N17549
Funding Number(s)
CONTRACT_GRANT: NGL-44-001-001
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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