300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
For a more detailed description of this table, click here.
Nutrient-poor semi-natural grassland community classified as a Festuco-Brometum, comprised of up to 40 vascular plant species dominated by Bromus erectus and Festuca rubra
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
1
|
|
|
Arithmetic Mean |
20%
|
|
|
Standard Error |
0%
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Winkler and Herbst (2004) |
FACE study with one or two harvests per year over a four-year period
|
20%
|
|
|