Collecting Composted Manure Samples (IMAGE) American Society of Agronomy Caption Manure samples were collected from top, middle and bottom locations within compost windrows before they were churned. Credit Mr. Andrew Olsen at Agriculture and Agri-Food Canada. 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.