particulate organic matter (IMAGE) University of Copenhagen - Faculty of Science Caption Microscale view on particulate organic matter (POM), with nicely visible plant cell structures which represent the carbon stored in the soils. Credit Carsten W. Müeller Usage Restrictions With credit License Original 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.