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Table 1 CO2 concentration in the steel cylinder and the actual CO2 concentration in the soil (μmol/mol)

From: Effects of elevated root zone CO2 on xerophytic shrubs in re-vegetated sandy dunes at smaller spatial and temporal scales

CO2 concentration in the steel cylinder 700 1,000 2,000 5,000 10,000 20,000 50,000
Actual CO2 concentration in the soil (mean ± SE) 685 ± 430.891 856 ± 316.562 1,524 ± 304.371 3,172 ± 622.621 5,538 ± 693.676 6,260 ± 724.741 7,974 ± 894.483