300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Ecosystem [Anthoxanthum odoratum L. (Sweet Vernalgrass), Cynosurus cristatus L. (Crested Dogstailgrass), Holcus lanatus L. (Common Velvetgrass), Lolium perenne L. (Perennial Ryegrass), Paspalum dilatatum (Dallas Grass), Poa trivialis L. (Rough Bluegrass), and Trifolium repens L. (White Clover)]
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300 ppm
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600 ppm
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900 ppm
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| Number of Results |
1
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| Arithmetic Mean |
12%
|
|
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| Standard Error |
0%
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Experimental Conditions
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300 ppm
|
600 ppm
|
900 ppm
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|
Clark et al. (1997) |
controlled environment rooms
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12%
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