300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Amaranthus hypochondriacus L. [Grain Amaranth]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
2
|
|
|
| Arithmetic Mean |
5.5%
|
|
|
| Standard Error |
3.9%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Ziska and Bunce (1997) |
glasshouse
|
11%
|
|
|
|
Ziska and Bunce (1999) |
Plants grown in controlled environment chambers for three weeks
|
0%
|
|
|