300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Hemigraphis alternata (Burm. f.) T. Anders. [Red Ivy]
| 300 ppm | 600 ppm | 900 ppm | |
| Number of Results |  |  | 1 | 
| Arithmetic Mean |  |  | -9% | 
| Standard Error |  |  | 0% | 
| Experimental Conditions | 300 ppm | 600 ppm | 900 ppm | |
| Davis and Potter (1983) | growth chambers |  | 
 | -9% | 
