300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Plantago major L. [Common Plantain]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
3
|
|
|
| Arithmetic Mean |
31.7%
|
|
|
| Standard Error |
4.6%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Denhertog et al. (1993) |
climate chambers
|
26%
|
|
|
|
Fonseca et al. (1997) |
climate rooms, fresh weight
|
26%
|
|
|
|
Poorter et al. (1988) |
growth room, nutrient solution
|
43%
|
|
|