Increasing plant biodiversity has been experimentally linked to increases in productivity, nutrient availability, ecosystem stability and resource-use efficiency, but the consequences of crop rotational diversity on belowground processes is uncertain. Lisa Tiemann is working to provide insights into belowground responses to rotational diversity. The Michigan State University soil biologist presents a combination of analytical and experimental data to help reveal rotational diversity effects on belowground processes that lead to enhanced soil services in agro-ecosystems.