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Microdensitometry to identify saline rangelands on 70-mm color-infrared aerial filmMany of the world's rangelands are affected by salinity. The detection of these areas is important to range and resource managers who are concerned with productivity, condition, and animal carrying capacity. The reported study was conducted along a north-to-south flight line 24 km long and 1.6 wide in Starr County, TX. Everitt et al. (1977) described seven different native range sites (four nonsaline and three saline) along this flight line. The study showed that photointerpretation by microdensitometry could be used to identify saline range sites quantitatively on CIR (0.50 to 0.90 micrometers) aerial film (scales 1:19,000, 1:42,000, and 1:80,000) exposed in May 1976, June 1976, and June 1979. Microdensitometer readings made on CIR film using white or blue light generally gave the best separation between saline and nonsaline range sites. The differences in microdensitometry readings among saline and nonsaline range sites were caused by less plant cover on the saline sites.
Document ID
19810062002
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Everitt, J. H.
(Department of Agriculture Weslaco, TX, United States)
Gerbermann, A. H.
(Department of Agriculture Weslaco, TX, United States)
Alaniz, M. A.
(U.S. Department of Agriculture Weslaco, TX, United States)
Date Acquired
August 11, 2013
Publication Date
September 1, 1981
Publication Information
Publication: Photogrammetric Engineering and Remote Sensing
Volume: 47
Subject Category
Earth Resources And Remote Sensing
Accession Number
81A46406
Funding Number(s)
CONTRACT_GRANT: NASA ORDER S-58376-G
Distribution Limits
Public
Copyright
Other

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