300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Plantago media L. [Hoary Plantain]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
2
|
|
|
| Arithmetic Mean |
26.5%
|
|
|
| Standard Error |
5.3%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Ferris and Taylor (1993) |
glasshouses, shoots
|
34%
|
|
|
|
Ferris and Taylor (1993) |
glasshouses, roots
|
19%
|
|
|