Iowa Corn Field Soil Sampling Site (image) DOE/Joint Genome Institute Share Print E-Mail Caption This is one of the Iowa corn field soil sampling sites used to generate data for the Michigan State, DOE Joint Genome Institute, Lawrence Berkeley National Laboratory study published in PNAS. Credit Jim Tiedje Usage Restrictions Please acknowledge Jim Tiedje. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.