The U.S. and China have signed off on a partial, “Phase One,” trade pact that includes a Chinese pledge to buy tens of billions of dollars of U.S. farm commodities, President Donald Trump said Friday.

There’s no immediate relief in sight for American farmers, as corn stocks remain large and increased demand for U.S. crops remains elusive, ag economist Dan Basse of AgResource told attendees of the American Seed Trade Association conference in Chicago Tuesday.

Brazil’s soybean harvest will be coming in a little later than normal this season, but farmers are expected to have a bumper crop.

President Donald Trump’s latest claim that he might push back a trade pact with China until after the 2020 elections has unleashed a new wave of uncertainty for America’s farmers who had been counting on promises that a resolution to the trade war was imminent.