300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Loblolly pine seedlings plus a variety of C3 and C4 weeds
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
2
|
|
|
| Arithmetic Mean |
0%
|
|
|
| Standard Error |
15.6%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Gavazzi et al. (2000) |
One-year-old pine seedlings plus weeds grown for four months in pots in growth chambers with adequate and inadequate levels of soil moisture; (pine seedlings, both water treatments)
|
22%
|
|
|
|
Gavazzi et al. (2000) |
One-year-old pine seedlings plus weeds grown for four months in pots in growth chambers with adequate and inadequate levels of soil moisture; (weeds, both water treatments)
|
-22%
|
|
|