Perennial bioenergy crops such as switchgrass have been proposed as an alternative fuel source to sustainably alleviate our reliance on climate-forcing fossil fuels via their potential for C sequestration. The Kravchenko lab has established that soil microporosity is a key feature that determines rates of C stabilization, and this research seeks to determine how these features vary between two bioenergy cropping systems – “monoculture” switchgrass and a diverse restored prairie – and whether these differences are consistent between 5 sites in WI and MI.