President Bush will seek deep cuts in farm and commodity programs in his new budget and in a major policy shift will propose overall limits on subsidy payments to farmers, administration officials said Saturday.

Such limits would help reduce the federal budget deficit and would inject market forces into the farm economy, the officials said.

The proposal puts Mr. Bush at odds with some of his most ardent supporters in the rural South, including cotton and rice growers in Alabama, Arkansas, Georgia, Louisiana and Mississippi.

The new chairman of the Senate Appropriations Committee, Thad Cochran of Mississippi, and more than 100 farm groups are gearing up to fight the White House proposal. The administration's willingness to push the proposal, despite such protests, suggests how tight the new budget will be.

Most of the subsidies are paid to large farm operators growing cotton and rice and, to a lesser degree, corn, soybeans and wheat.

Mr. Bush would set a firm overall limit of $250,000 on subsidies that can now exceed $1 million in some cases.