300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
For a more detailed description of this table, click here.
Cirsium arvense (L.) Scop. [Canadian Thistle]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
4
|
|
|
| Arithmetic Mean |
56.5%
|
|
|
| Standard Error |
8%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Ziska (2002) |
controlled environment chambers,35 days after sowing, mid-morning
|
64%
|
|
|
|
Ziska (2002) |
controlled environment chambers,35 days after sowing, mid-afternoon
|
41%
|
|
|
|
Ziska (2002) |
controlled environment chambers,52 days after sowing, mid-morning
|
42%
|
|
|
|
Ziska (2002) |
controlled environment chambers,52 days after sowing, mid-afternoon
|
79%
|
|
|