CHICAGO, Dec 2 (Reuters) - Spot basis bids for corn were mixed at U.S. Midwest ethanol plants on Tuesday and mostly steady to higher at other processing plants and at interior and river elevators.

• A corn processor in Lincoln, Nebraska, raised its spot basis bids by 3 cents a bushel. A river terminal in Seneca, Illinois, lifted its spot bid by 2 cents.

• Bids at Midwest ethanol plants were up 5 cents a bushel to down 7 cents.

• Grain merchants continued to roll their spot basis bids to the Chicago Board of Trade March contract CH26 from the December CZ25 ahead of the December contract's expiration next week.

• Spot basis bids for soybeans were mostly steady to lower at interior elevators and processing plants and unchanged at barge-loading river elevators.

• Farmer selling interest was muted on Tuesday as futures firmed but cash prices remained below recent highs.

• CBOT March corn futures CH26 were 6-1/2 cents higher at midmorning on Tuesday at $4.51-1/2 a bushel and January soybeans SF26 were up 1 cent at $11.29 a bushel. GRA/

Basis values are quoted against CBOT futures in cts/bu:

NOTE: 0 = Option price, UNC = Unchanged, UNQ = Unquoted

NC = Not comparable, DP = Delayed price, N/A = Not available,

F = January, H = March, K = May, N = JulyQ = August, U = September, X = November, Z = December

--------------------------------------------------------

LINKS: 0#USCSHGRN-PM

For U.S. forward basis spreadsheets, please click:

CORN/BASIS, SOYA/BASIS, WHEAT/BASIS, MILO/BASIS

- CBOT corn report COR/

- CBOT soybean report SOY/C

- CBOT wheat report WHE/C

- U.S. grain barge freight values BG/US

- U.S. Midwest cash grain PM GRA/PM

- U.S. CIF/FOB Gulf Grain GRA/F

(Reporting by Karl Plume; Editing by Lisa Shumaker)

((karl.plume@thomsonreuters.com; +1 313 484 5285))