This study examined how the presence of two dominant tall grass species, Andropogon gerardii and Sorgastrum nutans, affected soil microbial processes in prairie restorations. Soil samples were taken from 48 plots that included grass only, soil only, combined grass and soil, and control treatments. Microbial enzyme assays showed that the presence of the grasses significantly increased N-acetyl-glucosaminidase (NAG) activity, indicating effects on nitrogen cycling, but did not affect phosphatase, xylosidase, or cellobiohydrolase activity. Elevation also influenced all enzyme activities, with microbial processes varying across sites. The findings provide insight into how dominant grasses impact soil