Fig. 4

The inverse Simpson index and observed ASV richness in bacterial (A and C) and fungal (B and D) communities as a function of time after MS application and grouped by soil fumigation history. A protected t-test was used to compare diversity at each time point (i.e., 1 week, 3 weeks, and 6 weeks) to pretreatment. Significance levels were ****≤ 0.0001, ***≤ 0.001, **≤ 0.01, *< 0.05, and “ns” is not significant