Farmers here in Cass County have prospered over the last two decades by growing more soybeans than any other county in the United States, and by shipping most of those beans across the Pacific Ocean to feed Chinese pigs and chickens.

But this year, the Chinese have all but stopped buying. The largest market for one of America’s largest exports has shut its doors. The Chinese government imposed a tariff on American soybeans in response to the Trump administration’s tariffs on Chinese goods. The latest federal data, through mid-October, shows American soybean sales to China have declined by 94 percent from last year’s harvest.