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Photographs of custom infrared gas exchange system used for carbon balance measurement. (A) Entire setup including the LI‐6800 factory system. Note: The external CO2 tank is out of the frame, to the right of the bench. (B) Syringe‐based water delivery system to the sample chamber (view from below). (C) In‐line CO2 delivery using copper tubing. (D) Top view of the plant chamber water delivery system, with the light source removed.
