Inoculants (rhizobia) are typically not needed in fields where soybeans have been recently grown. If soybean has not been produced for 3-4 years previous, an inoculant may help to ensure adequate nodulation.
“For more information on this or other topics related to soybean production, contact your state extension specialist or your local extension educator/agent.”
The following is the link to the soybean extension specialists: state extension soybean specialist
