Soybean cupping observed in parts of Iowa probably isn't the result of glufosinate or 2,4-D choline, according to Iowa State professor Prashant Jha. The most likely culprit is dicamba on non-dicamba-resistant soybeans. Nearby tomatoes also aren't a good indicator of whether or not dicamba may have wandered afield.

While residue decomposition is largely controlled by the environment and soil conditions, there are some things no-tillers can do to help speed breakdown along.