Rhizosphere Soil for Microbial Isolations (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Rhizosphere soil for microbial isolations was collected from the Little Buck watershed at the University of California Hopland Research and Extension Center in an area in which Avena barbata are the dominant vegetation. Credit Heejung Cho Usage Restrictions None License Licensed content 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.