Fig. 3. Log transformed abundance of total protozoa, flagellates, ciliates, and amoebae in artificial burrows lined with corn leaf litter (LEAF); and L. terrestris burrows (WORM) treatments as a function of incubation time. Bars represent one standard deviation (n = 3). Asterisks indicate dates that values in WORM soil are significantly higher than in LEAF soil (P < 0.05).