Winter Rye (IMAGE) Penn State Caption A winter rye silage crop that received manure in the fall is shown. In the study, the conservation dairy-farming systems have continuous diversified plant cover, which reduces runoff of sediments and nutrients from fields. Credit Karsten Research Group, Penn State Usage Restrictions non commercial use 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.