300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Daucus carota L. var. sativus [Carrot]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
5
|
|
|
| Arithmetic Mean |
77.8%
|
|
|
| Standard Error |
32.3%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Idso and Kimball (1989) |
pots (17 liter), low temperature
|
35%
|
|
|
|
Idso and Kimball (1989) |
pots (17 liter), high temperature
|
160%
|
|
|
|
Idso et al. (1987) |
pots (17 liter), low temperature
|
0%
|
|
|
|
Idso et al. (1987) |
pots (17 liter), high temperature
|
170%
|
|
|
|
Wheeler et al. (2008) |
Plants grown in a field-based chamber at a mean temperature of 9?C
|
24%
|
|
|