Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Air Quality Data Analysis System for Interrelating Effects, Standards, and Needed Source Reductions: Part 10. Potential Ambient O3 Standards to Limit Soybean Crop Reduction.
Author Larsen, R. I. ; McCurdy, T. R. ; Johnson, P. M. ; Heck, W. W. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. ;Department of Agriculture, Raleigh, NC. ;North Carolina State Univ. at Raleigh. Dept. of Botany.
Publisher c1988
Year Published 1988
Report Number EPA/600/J-88/391;
Stock Number PB90-100553
Additional Subjects Soybean plants ; Plant growth ; Ozone ; Farm crops ; Soil water ; Statistical analysis ; Plant physiology ; Site surveys ; Graphs(Charts) ; Time studies ; Air quality ; Air pollution effects(Plants)
Library Call Number Additional Info Location Last
NTIS  PB90-100553 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 03/10/1990
Collation 9p
Soybean percent crop reduction is estimated as a function of ambient O3 concentrations for each of 80 agricultural sites in the National Aerometric Data Bank (NADB) for each available year of data for years 1981-1985. Fourteen O3 concentration statistics are calculated for each of the resulting 320 site-years of data. The two statistics that correlate best with estimated crop reduction are an effective mean O3 concentration (1 percent of variance unexplained) and an arithmetic mean O3 concentration 94 percent unexplained). The worst correlation of the 14 is for the statistic used in the present O3 National Ambient Air Quality Standard, the second highest daily maximum 1-h O3 concentration (42 percent unexplained). The number of site-years for estimated percent soybean yield reductions is plotted versus increasing O3 concentrations for each of the 14 O3 statistics. A maximum crop reduction line is drawn on each plot. The lines are used to estimate (and list) potential ambient O3 standards for each of the 14 statistics that would limit soybean crop reduction at agricultural NADB sites to 5, 10, 15, or 20 percent.