What follows are opening calls for U.S. grain and oilseed markets, which resume trading at 5 p.m. on the Chicago Board of Trade.
-- Soybean futures may open 2 cents to 4 cents a bushel higher on speculation that rain from Hurricane Isaac may cause damage and increase disease in immature crops, Tim Hannagan, a grain specialist at Alpari U.S. LLC in Chicago, said in a telephone interview.
-- Corn futures are called to open 1 cent to 2 cents a bushel higher as rain and wind from Isaac in the next five days threaten yields, Hannagan said.
-- Wheat futures may open steady to 2 cents a bushel higher on speculation that dry weather will reduce Australian production, limiting global supplies, Hannagan said.
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