CHICAGO, July 23 (Reuters) - Spot basis bids for corn and soybeans were mixed in the U.S. Midwest on Wednesday as selling remained slow and industry players kept a close eye on weather in the U.S. crop belts.

• The corn basis fell at a river terminal and two ethanol plants and rose at a river terminal.

• The soy basis fell at an Illinois river terminal and rose at an Iowa river terminal.

• Soybean futures climbed following a decline in U.S. crop ratings and hopes that trade deals may boost demand for U.S. exports.

• Corn rose slightly, clawing back some of Tuesday's losses, but forecasts for crop-friendly rain in U.S. grain belts and plentiful supply weighed.

• CBOT September corn futures CU25 were last down 1/2 cent to $3.98-3/4 per bushel, while new-crop December corn CZ25 was down 1/4 cent to $4.17-3/4 a bushel as of midday.

• CBOT August soybean futures SQ25 were up 4 cents to $10.14-1/4 per bushel. New-crop November soybeans SX25 were up 4-1/2 cents to $10.30 a bushel.

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

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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 Heather Schlitz, editing by Ed Osmond)

((Heather.Schlitz@thomsonreuters.com;))