Technical Comments

Comment on “Unexpected reversal of C3 versus C4 grass response to elevated CO2 during a 20-year field experiment”

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Science  10 Aug 2018:
Vol. 361, Issue 6402, eaau1073
DOI: 10.1126/science.aau1073


Reich et al. (Reports, 20 April 2018, p. 317) assert that the responses of C3 and C4 grass biomass to elevated CO2 “challenge the current C3-C4 [elevated CO2] paradigm,” but these responses can be explained by the natural history of the experimental plants and soils without challenging this paradigm.

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