Four in Hand Plow (IMAGE) Penn State Caption Farmers in places such as Lancaster County, Pennsylvania, will likely have to change their corn-growing strategies to succeed in the future, researchers say. Farmers in that area may have to plant corn earlier and even use irrigation -- as they now do in much of the Midwest -- to maintain corn yields adequate to sustain dairy farms. Credit Smallbones 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.