300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Bromus madritensis L. [Compact Brome]
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
2
|
|
|
Arithmetic Mean |
7%
|
|
|
Standard Error |
14.1%
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Dhillion et al. (1996) |
greenhouses
|
27%
|
|
|
Roumet et al. (2000) |
Grown from seed in well-watered and fertilized pots for six months in glasshouses
|
-13%
|
|
|