Circular Crop Irrigation (image) Stanford University Caption Center-pivot sprinklers create striking circular patterns of crops. The areas in between each circle don't get watered and therefore have scant vegetation. Credit Photo credit: Doug Wilson/USDA Agricultural Research Service Usage Restrictions May not be altered or sold. 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.