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2
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Plant Photosynthesis (Net CO2 Exchange Rate) Responses
to Atmospheric CO
2
Enrichment
Y
300 ppm
600 ppm
900 ppm
Plant Name
Number of
Studies
Arithmetic
Mean
Standard
Error
Number of
Studies
Arithmetic
Mean
Standard
Error
Number of
Studies
Arithmetic
Mean
Standard
Error
Yarrow [
Achillea millefolium
L.]
4
30.8%
12.9%
1
62%
0%
Yellow Pitaya [
Selenicereus megalanthus
]
1
125%
0%
Yellowtops, Clustered [
Flaveria trinervia
(Spreng.) C. Mohr]
4
30.8%
12.9%
1
62%
0%
Yellowtops [
Flaveria pringlei
Gandoger]
4
30.8%
12.9%
1
62%
0%
Yellowtops, Florida [
Flaveria floridana
J.R. Johnston]
4
30.8%
12.9%
1
62%
0%
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