Amended Soil (IMAGE) American Society of Agronomy Caption In this field with histosol soil, miscanthus was added as a form of organic matter. It is a type of biomass crop they studied to see if it can add carbon to the soil. Credit Jacynthe Dessureault-Rompre Usage Restrictions For use with story only. 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.