CHICAGO, July 21 (Reuters) - The following are U.S. expectations for the resumption of grain and soy complex trading at the Chicago Board of Trade at 8:30 a.m. CDT (1330 GMT) on Tuesday.

WHEAT - Down 2 to 5 cents per bushel

• CBOT wheat eased after rallying last week on Russian and Ukrainian attacks on grain ships and ports in the Black Sea and the Sea of Azov.

• Russian wheat export prices surged last week owing to difficult shipping conditions in the Black Sea and a new wave of attacks in the Strait of Hormuz, analysts said on Monday.

• The Sovecon agriculture consultancy on Tuesday cut its forecast for Russia's wheat crop this year to 88.3 million metric tons, down from 88.9 million tons, citing weaker prospects in the south of the country and a smaller spring wheat area.

• CBOT September soft red winter wheat WU26 was last down 5 cents at $6.69 per bushel. K.C. September hard red winter wheat KWU26 was down 3 cents at $7.20-3/4 per bushel, while Minneapolis September spring wheat MWEU26 fell 2-3/4 cents to $6.89-1/2 per bushel.

CORN - Down 2 to 3 cents per bushel

• Corn futures fell as better-than-expected U.S. crop ratings weighed on prices.

• The U.S. Department of Agriculture on Monday kept condition ratings for the nation's corn and soybean crops mostly steady from the previous week, surpassing analyst expectations in a Reuters poll of 11 analysts.

• The agency pegged condition ratings for the U.S. corn crop at 67%, one percentage point below the previous week's rating. Analysts had expected a rating of 66%.

• CBOT December corn CZ26 was last down 3-1/4 cents at $4.69-3/4 per bushel.

SOYBEANS - Down 3 to 9 cents per bushel

• Soybean futures slid after soybean ratings for the U.S. crop improved from the previous week.

• The agency said 66% of the U.S. crop is in good-to-excellent condition, up a percentage point from the previous week and above analyst expectations.

• CBOT November soybeans SX26 were last 3-1/2 cents lower at$12.22-3/4 per bushel.