(Rewrites throughout, adds USDA acreage and stocks data, adds

quote, updates prices, adds byline, changes dateline from

PARIS/BEIJING)

* USDA estimated June 1 corn stocks at 5.295 billion

bushels, below analysts' 5.408 billion

* USDA pegged all wheat plantings at 42.740 million acres,

below the 43.858 million estimate

* USDA pegged soybean plantings at 85.365 million acres, in

line with trade estimates

By Karl Plume

CHICAGO, June 30 (Reuters) - U.S. corn futures jumped on

Tuesday after the U.S. Department of Agriculture said American

farmers planted 3% fewer acres of the crop this year and that

stocks of the grain have tightened by more than traders had

expected.

Wheat futures rallied after the government estimated

plantings well below expectations, while soybean futures

followed corn prices higher as the USDA pegged planted acres in

line with trade estimates.

U.S. farmers planted 95.343 million acres of corn in 2026, down

from 98.788 million last year but above the average analyst

estimate for 94.992 million, the U.S. Department of Agriculture

said in its annual acreage report. Growers scrambled to

capitalize on rising grain prices and favourable growing

weather, analysts said.

Corn stocks as of June 1 were estimated at 5.295 billion

bushels, below the average estimate of 5.408 billion.

"The higher (corn) acreage was equalled out by lower

stocks," said Craig Turner, consultant at StoneX. "For corn the

stocks being off is showing demand is out there for corn, and

we'll probably continue to see that."

The USDA pegged soybean plantings at 85.365 million acres,

up from 81.215 million in 2025 and on par with estimates. All

wheat plantings were well below expectations at 42.740 million

acres, compared with the average pre-report estimate for 43.858

million.

A favourable start to the U.S. Midwest growing season,

strength in the dollar and falling oil prices following

de-escalation in the Iran war have weighed on corn and soybean

prices. Most corn contracts on the Chicago Board of Trade hit

contract lows ahead of the USDA report.

CBOT December corn futures were up 6-1/4 cents at

$4.36-1/4 a bushel by 12:40 p.m. CDT (1740 GMT), rebounding from

a contract low of $4.25-3/4 a bushel. New-crop November soybeans

were up 6-1/4 cents at $11.45-1/4 a bushel.

CBOT September wheat gained 12 cents to $5.91-3/4 a

bushel, after hitting a four-month low earlier in the session.

(Additional reporting by Heather Schlitz in Chicago, Gus Trompiz

in Paris, and Ella Cao and Lewis Jackson in Beijing; Editing by

Subhranshu Sahu, Harikrishnan Nair and Alexander Smith )