Figure 2. Simulating the impacts of elevated
CO2 on biomass accumulation of C3 and C4 crops with the
RUE method and RP module. The results of the RUE methods show an
increment in yield for both C3 and C4 crops. But the RP module shows
different responses of C3 and C4 crops to elevated CO2 concentrations,
which is consistent with that from field experiments.