300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Understory deciduous trees (Liquidambar styraciflua L., Acer rubrum L., Ulmus alata Michx. and Cornus florida L.) in a Pinus taeda L. Plantation
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
1
|
|
|
Arithmetic Mean |
70%
|
|
|
Standard Error |
0%
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Schafer et al. (2003) |
In the third and fourth year of the Duke Forest FACE study
|
70%
|
|
|