U.S. Cash Grains-Corn basis firms, Soybeans mixed-lower

Spot basis bids for corn firmed across the U.S. Midwest on Tuesday, though logistics challenges continued along railways following holiday closures and a recent winter storm that slowed grain movement, brokers said.

* Farmer sales of soybeans have picked up, after Chicago Board of Trade futures climbed above $15.00 a bushel, said one Indiana grain dealer.

* Corn basis firmed at a processor in Cedar Rapids Iowa, a Savanna, Illinois, river terminal and an ethanol plan in Annawan, Illinois.

* Bids for soybeans were mixed to lower, firming in Savanna, Illinois but falling at a Lincoln, Nebraska, processor and an elevator in Cincinnati, Ohio.
Source: Reuters (Reporting by Christopher Walljasper; editing by Jonathan Oatis)