Record Display for the EPA National Library Catalog

RECORD NUMBER: 25 OF 52

Main Title Experimental Air Exclusion System for Field Studies of SO2 Effects on Crop Productivity.
Author Jones, H. C. ; Lacasse, N. L. ; Liggett, W. S. ; Weatherford., Frances ;
CORP Author Tennessee Valley Authority, Chattanooga. Div. of Environmental Planning.;Environmental Protection Agency, Washington, D.C. Office of Energy, Minerals and Industry.
Year Published 1977
Report Number TVA-E-EP-77-5; EPA/600/7-77/122;
Stock Number PB-276 985
Additional Subjects Air pollution ; Sulfur dioxide ; Soybean plants ; Field tests ; Toxicity ; Air filters ; Exposure ; Yield ; Efficiency ; Soil fertility ; pH ; Planting ; Monitoring ; Ozone ; Plant growth ; Regression analysis ; Correlation techniques ; Production ; Seeds ; Mathematical models ; Chlorosis ; Air pollution effects(Plants)
Holdings
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Status
NTIS  PB-276 985 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 76p
Abstract
The Tennessee Valley Authority (TVA) characterized and quantified relationships among sulfur dioxide (SO2) exposure, symptomatology of injury, and yield of soybean crops, which are sensitive to SO2 and economically important to the southeastern United States. Characterization included analysis of soil fertility, pH, soil depth, slope, and content of organic matter. Regression analysis was used to identify site factors that might affect yield and mask the effects of SO2 exposure; results of the analyses were used to control or eliminate those factors. TVA designed, constructed, and tested an air-exclusion system that permits the comparison of plants exposed to SO2 with plants at the same site that were protected from SO2 exposure. Tests showed the system to be as much as 85 percent efficient in excluding or reducing SO2 concentrations to subthreshold levels during exposure.