300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Striga hermonthica [Purple Witchweed]
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
1
|
|
|
Arithmetic Mean |
-65%
|
|
|
Standard Error |
0%
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Watling and Press (1997) |
S. hermonthica, a parasitic C3 weed that affects grain crops, was allowed to infect sorghum for two months in controlled environment cabinets
|
-65%
|
|
|