| Main Title |
Programmable Exposure Control System for Determination of the Effects of Pollutant Exposure Regimes on Plant Growth. |
| Author |
Hogsett, W. E. ;
Tingey, D. T. ;
Holman, S. R. ;
|
| CORP Author |
Corvallis Environmental Research Lab., OR. ;Northrop Services, Inc., Corvallis, OR. |
| Year Published |
1985 |
| Report Number |
EPA/600/J-85/217; |
| Stock Number |
PB86-121548 |
| Additional Subjects |
Ozone ;
Exposure ;
Plant growth ;
Air pollution ;
Response ;
Profiles ;
Concentration(Composition) ;
Automatic control equipment ;
Grasses ;
Periodic variations ;
Reprints ;
Alfalfa ;
Fescue
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB86-121548 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
13p |
| Abstract |
A field-exposure research facility was constructed to provide a controlled environment to determine the influence of the various components of ozone exposure on plant response. The facility uses modified open-top chambers and an automated control system for continuous delivery and control of single or multiple pollutants over a growing season. The hourly ozone concentration in each chamber ranged from 2 to 12% of the requested concentration over a 174-day season. Initial studies with this facility compared the response of alfalfa and tall fescue growth to episodic and daily peak exposure profiles with equivalent integrated exposure indices over the growing season. Over the period of three cuttings (133 days) alfalfa growth was reduced more when exposed to the episodic profile than with the exposure regime of daily ozone peaks. Tall fescue growth was reduced only slightly over a period of three cuttings (90 days) when exposed to either regime. |
| Supplementary Notes |
Prepared in cooperation with Northrop Services, Inc., Corvallis, OR. |
| Availability Notes |
Pub. in Atmospheric Environment, v19 n7 p1135-1145 1985. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Programmable Exposure Control System for Determination of the Effects of Pollutant Exposure Regimes on Plant Growth. |
| PUB Date Free Form |
c1985 |
| Category Codes |
2D; 68A; 98D |
| NTIS Prices |
Not available NTIS |
| Primary Description |
600/02 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
603117001 |
| Origin |
NTIS |
| Type |
CAT |
