Ragweed in Soybean Field (IMAGE) American Society of Agronomy Caption A ragweed plant rises above neighboring soybean. In the study, ragweed hurt soybean yields by competing for sunlight. Credit Ethann Barnes Usage Restrictions Please use with story only 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.