300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Liriodendron tulipifera L. [Yellow Poplar]
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
3
|
|
|
Arithmetic Mean |
34%
|
|
|
Standard Error |
4.7%
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Loats and Rebbeck (1999) |
growth chambers
|
24%
|
|
|
Naumburg and Ellsworth (2000) |
FACE, June 1998, low light
|
44%
|
|
|
Naumburg and Ellsworth (2000) |
FACE, June 1998, high light
|
34%
|
|
|