With Arrow (IMAGE) American Society of Agronomy Caption The researchers imaged canola tap roots to see if they were stunted or dying from the urea fertilizer band as they grew into it. Arrow points to stunted root tip. Credit Justin Archibald Usage Restrictions 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.