Soil Features (IMAGE) University of Missouri-Columbia Caption These are digital images of soil features classified by hue, value (lightness or darkness) and chroma (saturation). Computer-assisted classification of soil types can be a more robust alternative to comparing samples in the field with printed color charts. Credit Courtesy Kevin O'Donnell, University of Missouri Usage Restrictions Credit University of Missouri 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.