300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Agropyron smithii Rydb. [Western Wheatgrass]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
3
|
|
|
| Arithmetic Mean |
50.3%
|
|
|
| Standard Error |
42.2%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Smith et al. (1987) |
pots (4 liters), greenhouse
|
16%
|
|
|
|
Volin et al. (1998) |
controlled-environment chamber, low ozone
|
-17%
|
|
|
|
Volin et al. (1998) |
controlled-environment chamber,high ozone
|
152%
|
|
|