Crop-abandonment-map (IMAGE) University of Wisconsin-Madison Caption A map showing the percentage of abandoned farmland within a 36-square-kilometer area. Most of the more than 30 million acres of cultivated land abandoned between 1986 and 2018 is concentrated in the Great Plains and the Mississippi River valley. Credit UW–Madison Usage Restrictions None License Original 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.