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
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB89-144430 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
16p |
Abstract |
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. |