300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Populus grandidentata Michx. [Bigtooth Aspen]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
1
|
|
|
| Arithmetic Mean |
29%
|
|
|
| Standard Error |
0%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Zak et al. (1996) |
open-top chamber
|
29%
|
|
|