Nodules (image) American Society of Agronomy Share Print E-Mail Caption Nodules forming on the root of a soybean plant. These nodules will give a home to soil microbes in exchange for nitrogen. Credit Vivian Wauters Usage Restrictions For use with story only. Share Print E-Mail 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.