Alison Robertson, Iowa State University (IMAGE) Iowa State University Caption Alison Robertson is coordinating experiments in 15 states to see how the timing of cover crop termination affects susceptibility to disease in crops. Robertson's previous research indicated waiting at least two weeks after termination to plant crops reduces the likelihood of disease in corn, but a new project will allow her to test her results across a wide range of environments. Credit Christopher Gannon Usage Restrictions None 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.