300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Ferocactus acanthodes (Engelm.) Orcutt [California Barrelcactus]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
1
|
|
|
| Arithmetic Mean |
30%
|
|
|
| Standard Error |
0%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Nobel and Hartsock (1986) |
pots, daytime
|
30%
|
|
|