Senator Tom Harkin (D-IA) (IMAGE) American Society of Agronomy Caption US Sen. Tom Harkin (D-IA) accepts an award on April 18 that recognizes his unwavering and long-time support for the agricultural and biological sciences. Credit ESA 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.