China should be buying wheat, corn and rice from the U.S. as a result of the "phase one" trade deal and tariffs will not hamper those sales, Gregg Doud, chief agricultural negotiator with the office of the U.S. Trade Representative said Friday.

China has committed to buy at least $80 billion in U.S. farm products over the next two years and the country also agreed to sweeping structural changes that promise to improve trade on a more permanent basis for U.S. beef, pork, rice, corn, wheat, soybeans and other commodities.

Chinese Vice Premier Liu He is set to sign a landmark, partial trade deal in Washington this week that could be crucial to reviving a farm economy that has been dependent on an infusion of government payments to offset the damage from the U.S.-China trade war.

Corn production increases offset by harvested acre reductions provided a relatively neutral World Agricultural Supply and Demand Estimates report Friday giving grain traders a sense of relief.

China has agreed to make significant policy changes to tear down non-tariff barriers to U.S. farm commodities under the trade deal expected to be signed early next year, according to industry sources who were briefed on the pact and government officials with knowledge of the briefing.

President Donald Trump announced Monday the U.S. will be restoring tariffs on Brazilian and Argentine steel and aluminum, potentially disrupting the recently improving U.S. trade relationships with Brazil.

An agreement 24 years in the making is set to come to fruition as the Brazilian government prepares to implement a tariff rate quota to allow an increase in duty-free wheat imports.

USDA’s World Agricultural Supply and Demand Estimates report fell in line with trade expectations when it lowered corn ending stocks as producers struggle with a challenging harvest.

President Donald Trump and White House officials insist that China will be buying $40 billion to 50 billion worth of U.S. agricultural products annually over the next couple of years, if the countries nail down a trade deal in the coming weeks, but the question is whether U.S. farmers, processors and exporters could meet that challenge.

USDA announced Thursday export sales of 130,000 metric tons of U.S. white wheat for delivery to China, a sale that comes one week ahead of the next round of bilateral trade negotiations.