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Percent Dry Weight (Biomass) Increases for 300, 600 and 900 ppm
Increases in the Air's CO2 Concentration:

For a more detailed description of this table, click here.

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)]

Journal Reference

Experimental Conditions
300 ppm

600 ppm

900 ppm
Clark et al. (1997)
controlled environment rooms
12%