illinidirtfarmer - 5/6/2024 21:29 I can’t find it now, but several years ago a U of I grad student did her graduate thesis on increasing CO2 levels in real world conditions. She set up a circle of various crops around a nozzle that expelled CO2 around the clock. She also tracked wind speed and direction. Regardless of the crop, and I think she had corn, soybeans, and several vegetable crops in the circle, the more CO2 that was carried to the crop by the wind for the greatest amount of time, the yield was increased. She presented her findings at the winter agronomy conferences, and I also saw her setup at Agronomy Day. It wasn’t the results she was hoping for, because she wanted to show that increased CO2 was bad for all plant life. This wasn’t in a greenhouse, it was in open air.