Record Display for the EPA National Library Catalog


Main Title Use of a Spectroradiometer to Study Aerial Photographs of Ozone-Treated Soybeans.
Author Edwards, G. J. ; Cure., W. W. ;
CORP Author Citrus Research and Education Center, Lake Alfred, FL. ;North Carolina State Univ. at Raleigh.;Corvallis Environmental Research Lab., OR.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/412;
Stock Number PB90-245838
Additional Subjects Ozone ; Soybean plants ; Spectroradiometers ; Aerial surveys ; Remote sensing ; Farm crops ; Optical density ; Plant growth ; Reprints ; Air pollution effects(Plants)
Library Call Number Additional Info Location Last
NTIS  PB90-245838 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
A scanning spectroradiometer was used to measure the optical densities of an aerial photograph of an experimental field in which soybeans were growing in response to different concentrations of ozone, an air pollutant. The plants were growing in 3 m diameter, 2.4 m high open-top exposure chambers. Correlation coefficients among the film densities, plant yield and visual estimates of non-green leaf area for the 16 test plots were highly significant (p<0.0); those with ozone treatment concentrations were significant (p<0.05). The early senescence induced by this form of environmental stress can thus be detected by film density differences, and these differences are well correlated with ground indicators of crop condition. (Copyright (c) 1989 Taylor & Francis Ltd.)