Sheep Farmers on Rangeland (IMAGE) University of California - Davis Caption Sheep from Skyelark Ranch graze a field planted with a cover crop in Brooks, Calif. Credit Joe Proudman/UC Davis Usage Restrictions Provide credit. 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.