American corn farmers are feeling better about their prospects with billions more in government aid and optimal growing conditions. There’s only one downer — demand.

The trade war between the U.S. and China continues to surprise agricultural markets, even delivering an unexpected reprieve for American farmers who have otherwise been roiled by the conflict.

In a tweet July 30, President Donald Trump scolded China for what he said was a failure to follow through on promises to boost agriculture trade.

Shipments of American soybeans are at the lowest level since before the U.S.-China trade war in what could be a worrying sign for growers hoping for the Asian giant to accelerate purchases ahead of a trade deal.