Figure 1.

Mean CO₂ flux rates over time. Error bars ±1 s.e., n=8–16. Dotted line indicates plots that received fresh stover additions. Dashed orange line indicates plots that received PyOM additions. Solid yellow line indicates plots that had no additions. *Indicates significant differences between plots with PyOM additions and stover or no-addition plots, whereas ‡ indicates significant differences between plots that received fresh stover additions and PyOM or no-addition plots (mixed model repeated measures design, Tukey-adjusted post-hoc comparisons, P<0.05). X indicates days where microbial community was sampled. • indicates days where ¹³CO₂ flux was partitioned between SOC and amendments. The color reproduction of this figure is available at the The ISME Journal online.