Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Response of Turnips to Chronic Doses of Ozone in Open-Top Field Chambers.
Author Heagle, A. S. ; Cure, W. W. ; Rawlings, J. O. ;
CORP Author Agricultural Research Service, Washington, DC. ;North Carolina State Univ. at Raleigh.;Corvallis Environmental Research Lab., OR.
Year Published 1985
Report Number EPA/600/J-85/245;
Stock Number PB86-136983
Additional Subjects Ozone ; Root crops ; Air pollution ; Dosage ; Field tests ; Exposure ; Concentration(Composition) ; Necrosis ; Leaves(Botany) ; Weight(Mass) ; Losses ; Survival ; Reprints ; Brassica rappa ; Turnips
Library Call Number Additional Info Location Last
NTIS  PB86-136983 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 16p
Turnips Brassica rapa L., were exposed to chronic doses of ozone(O3) by adding different amounts of O3 for 7 h a day to non-filtered air in open-top field chambers. One cultivar(Tokyo Cross) was tested in 1979 and four cultivars (Tokyo Cross, Shogoin, Purple Top White Globe and Just Right) in 1980. Ambient levels of O3 usually did not affect shoot or root weight in either year. In 1979, seasonal mean O3 levels greater than ambient caused greater percentage growth decreases of Tokyo Cross plants grown in the ground than for plants grown in 3.8 litre pots. In 1980, 7 h a day exposures from 20 October to 14 November to levels as high as 0.16 ppm caused some chlorosis on a few of the oldest leaves of all cultivars. No O3 was added from 15-17 November because the weather was cold, overcast and rainy. Exposures to 03 concentrations of 0.09 or 0.11 ppm for 3.5 h on the afternoon of 18 November caused severe foliar necrosis on all expanded leaves of all cultivars. (Copyright (c) Elsevier Applied Science Publishers Ltd, England, 1985.)