In the "Experimental Conditions" column of each table, we provide a brief description of growing conditions, including how the plants were grown, i.e., in pots, growth chambers, open-top chambers, FACE, etc.

In the last three columns of each table we provide the CO2-induced growth response, expressed as the percent increase in either plant biomass or photosynthesis for a 300, 600 or 900 ppm increase in the air's CO2 concentration above ambient conditions.  When the CO2 increase was not exactly 300, 600 or 900 ppm, we have computed a linear adjustment to the nearest 300 ppm interval.  For example, if the CO2 increase was 350 ppm and the growth response was a 60% enhancement, we would calcualte the adjusted 300 ppm CO2 growth response as (300/350) x 60% = 51%.