Hurst 2 Soil Sample (IMAGE) American Society of Agronomy Caption Hurst samples soils from a natural hardwood forest wetland. The soil bacteria in this wetland are vital filters for the Mississippi River. Credit Photo credit Joseph Baustian, The Nature Conservancy. Usage Restrictions Please 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.