300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Ambrosia artemisiifolia L. [Annual Ragweed]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
3
|
|
|
| Arithmetic Mean |
37.7%
|
|
|
| Standard Error |
5.2%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Hirose et al. (1996) |
glasshouse
|
34%
|
|
|
|
Hirose et al. (1997) |
glasshouse
|
29%
|
|
|
|
Hirose et al. (1997) |
glasshouse, mixed stand with Abutilon theophrasti
|
50%
|
|
|