ACKNOWLEDGEMENTS
We would like to thank Michelle Quigley from Michigan State University for conducting X-ray μCT scanning, Martin Pentrak from University of Illinois-Champaign for conducting X-ray powder diffraction, Jenie Gil Lugo and Maxwell Oerther for assistance with sample collection, and the Kellogg Biological Station and Great Lakes Bioenergy Research Center team for agronomic management of the field experiment. This research was funded by the Great Lakes Bioenergy Research Center, U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research under Award Number DE-SC0018409. The work was also supported by the NSF LTER Program (DEB 1027253) at Kellogg Biological Station, by Michigan State University’s AgBioResearch, and by NC Regional Multistate Project 1187.