CHICAGO, June 3 (Xinhua) -- Chicago Board of Trade (CBOT) agricultural futures fell across the board on Friday, led by soybean.

       The most active corn contract for July delivery fell 3.25 cents, or 0.45 percent, to settle at 7.27 U.S. dollars per bushel. July wheat lost 18.25 cents, or 1.72 percent, to settle at 10.4 dollars per bushel. July soybean shed 31.5 cents, or 1.82 percent, to settle at 16.9775 dollars per bushel.

       Traders awaited the meeting to be held in Istanbul, Turkey Wednesday on the operational details of a Ukraine food corridor. China is on holiday.

       Turkey is fingered as a destination for Ukraine wheat by Russia. But the trust of Ukraine in Turkey to monitor/provide security for a marine grain export corridor is low. If the corridor is not allowed, or takes months to operationally engage, world end importers and end users will step forward as Egypt and Algeria did this week.

       U.S. cash corn and soybean markets are stout and underpinning July futures. It only takes a modest weather scare to produce new CBOT highs. The risks are to the upside, and Chicago-based research company AgResource stays bullish.

       There is limited rainfall for the Northern Plains and the South Central Canadian Prairies. The best rain will drop across the Central Plains, Missouri, and Wisconsin. No extreme heat is noted with a tropical system farther south across Florida. The forecast leans favorable to Central U.S. crops.