The Iowa Corn Growers Association (ICGA) blasted the Trump administration on Tuesday, saying the government has put it in “one hell of a bad situation.”

The trade association hammered President Trump for approving what it called 31 “unjustified” refinery waivers tied to ethanol, along with his year-plus trade war with China. Those two issues, combined with the effects of climate change, are forcing the value of Iowa corn to drop ahead of harvest season, the group said.

“Agriculture is in one hell of a bad situation right now. The government put us in this situation, and they need to help us get out of it,” Vic Miller, a corn farmer from Fayette County, said in a statement. “It’s time for President Trump to make rural America and the [Renewable Fuel Standard] great again. He made promises to American farmers and now it’s time for him to keep them.”