Waterhemp in corn field (IMAGE) University of British Columbia Caption Waterhemp can drastically reduce corn and soy yields, as seen on the right in a corn field in Essex County. Credit Julia Kreiner, University of British Columbia. Usage Restrictions n/a 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.