300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Amaranthus hybridus L. [Slim Amaranth]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
2
|
1
|
|
| Arithmetic Mean |
2.5%
|
23%
|
|
| Standard Error |
1.8%
|
0
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Breen et al. (1986) |
field
|
5%
|
|
|
|
Hesketh et al. (1984) |
field
|
0%
|
23% |
|