Soybeans rose to a record for a third day Thursday but later retreated on expectations that warm, dry weather in the Midwest will help crops bounce back after last month’s floods.

Other commodities traded mixed, with crude oil briefly rising to a new record near $146 and gold, silver and copper futures falling.

Soybean futures have shot up 9 percent in the last week, driven by concerns of poorer-than-expected U.S. yields following devastating Midwest floods that ravaged corn and soybean fields. But weather forecasts over the next few days predict cooler temperatures for much of the region, a scenario that would boost soybean crops as they enter the key growing period.

“We’re basically trading the weather right now,” said Jason Ward, analyst with Northstar Commodity in Minneapolis. “The weather looks to be normal heading into the weekend so that’s a little bearish for soybeans.”

Soybeans for November delivery jumped to a record $16.3675 a bushel in overnight trading on the Chicago Board of Trade before slipping back to $16.265 a bushel, down 3.5 cents. It was the third straight trading record for soybeans. Prices settled at $16.30 on Wednesday.

U.S. farmers plan to harvest 96.8 percent of this year’s 74.5 million acre soybean crop, down from an estimate of 98.7 percent that was calculated before severe floods struck the Midwest last month, the U.S. Department of Agriculture said in its annual acreage survey released Monday. Nationwide, farmers said only 70 percent of the intended soybean crop had been planted at the time of the U.S.D.A. survey interview, the lowest level in 12 years.

Other agriculture futures traded mixed Thursday. Corn futures for December delivery lost 7.75 cents to $7.7275 a bushel on the CBOT, while wheat futures for September delivery added 9.75 cents to $8.90 a bushel.

In energy markets, oil prices shot up near $146 but later eased back after the dollar gained some ground against the euro.

Light, sweet crude for August delivery added 90 cents to $144.47 on the New York Mercantile Exchange. Earlier, prices rose as high as $145.85 a barrel, a new trading record.

Other energy futures also rose. August gasoline futures added 0.62 cent to $3.556 a gallon on the Nymex, while August heating oil futures rose 2.07 cents to $4.0922 a gallon.

In precious metals, gold futures fell in erratic trading after the dollar strengthened against the euro, encouraging selling from investors who bought the metal as an inflation hedge.

Gold for August delivery fell $11.90 to $934.30 an ounce on Nymex, after earlier rising as high as $950.

September silver lost 5.2 cents to $18.285 an ounce on the Nymex, while September copper dropped 11.85 cents to $3.945 a pound.