Cash bids for corn were steady at processors.

Soybean bids were steady to firm at processors and steady to weak at river terminals and interior elevators.

Farmer selling was slow, with most growers waiting to see if the US Agriculture Department's monthly supply and demand report on Thursday provided a bullish spark to the market.

Some growers had booked some deals to sell old-crop soybeans earlier this week, a dealer in Council Bluffs, Iowa, said.

The light farmer sales of corn in recent weeks supported basis levels.