300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Helainthus petiolaris Nutt. [Prairie Sunflower]
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
2
|
|
|
Arithmetic Mean |
20%
|
|
|
Standard Error |
0%
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Sobrado and Turner (1986) |
pots, water-stressed
|
20%
|
|
|
Sobrado and Turner (1986) |
pots, well-stressed
|
20%
|
|
|