Record Display for the EPA National Library Catalog


Main Title Assessing the Impacts of Soil Moisture Stress on Regional Soybean Yield and Its Sensitivity to Ozone (Journal Version).
Author King, D. A. ; Nelson, W. L. ;
CORP Author Portland Univ., OR. Dept. of Physical and Life Sciences. ;Doane Publishing, St. Louis, MO.;Corvallis Environmental Research Lab., OR.
Publisher c1987
Year Published 1987
Report Number EPA/600/J-87/469;
Stock Number PB89-144430
Additional Subjects Ozone ; Stress(Physiology) ; Droughts ; Soybean plants ; Plant physiology ; Sensitivity ; Regional analysis ; Soil water ; Oxygen ; Forecasting ; Mathematical models ; Yield ; Reprints ; Air pollution effects(Plants) ; Glycine max
Library Call Number Additional Info Location Last
NTIS  PB89-144430 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16p
Plants that experience moisture stress show less ozone-caused injury than non-stressed plants exposed to similar levels of ozone. To evaluate the interaction of moisture stress and ozone for soybean grown in the U.S.A., relative yields were simulated with a model to compute a general relationship between moisture stress effects on yield and crop sensitivity to ozone. In 1980 a 25% reduction in ozone would have increased mean yield by 6.0% for adequately watered soybeans, but only a 4.6% increase was predicted when moisture stress was included. This shift represents a 23% decline in sensitivity to ozone caused by moisture stress. The mean predicted ozone impact on soybean yield for 1979-1983 was reduced 19% by moisture stress. These predictions agree with drought-induced reductions in ozone sensitivity observed in pot-grown soybeans, but results from field experiments involving moisture stress are less certain.