Percent Photosynthesis (Net CO2 Exchange Rate) Increases for
300, 600 and 900 ppmIncreases in the Air's CO2 Concentration:


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Betula pubescens Ehrh. [Downy Birch]


Statistics
 
300 ppm
600 ppm
900 ppm
 Number of Results
4
4
4
 Arithmetic Mean
113.5%
0%
0%
 Standard Error
67.2%
0
0%

Individual Experiment Results

Journal References

Experimental Conditions
300 ppm
600 ppm
900 ppm

Beerling et al. (1996)

greenhouse, + 3°C warming, year 1
55%

Beerling et al. (1996)

greenhouse, + 3°C warming, year 2
15%

Beerling and Woodward (1996)

controlled environment greenhouse, July
345%

Beerling and Woodward (1996)

controlled environment greenhouse, September
39%


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