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Daily average concentrations of ambient CO2, elevated CO2, ambient ozone and elevated ozone measured during the crop growing years 2016–2017 and 2017–2018 for complete crop growth period starting from days after sowing (DAS) until harvest. The two year average values were ambient CO2 (405.4 ± 4.7 ppm), elevated CO2 (561.2 ± 20.9 ppm), ambient ozone (30.7 ± 4.4 ppb) and elevated ozone (72.2 ± 5.9 ppb).
