CO2 sink

Gilmanov, Tagir G, Bruce K Wylie, Larry L Tieszen, Tilden P Meyers, Vern S Baron, Carl J Bernacch, David P Billesbach, George G Burba, Marc L Fischer, Aaron J Glenn, Niall P Hanan, Jerry L Hatfield, Mark W Heuer, Steven E Hollinger, Daniel M Howard, Roser Matamala, John H Prueger, Mario Tenuta, and David G Young. "CO₂ uptake and ecophysiological parameters of the grain crops of midcontinent North America: Estimates from flux tower measurements." Agriculture, Ecosystems & Environment 164 (2013) 162–175.