China currently buys nearly a third of the U.S. soybean crop — but the country plans to impose tariffs, in response to a Trump administration plan. Here, a worker takes a sample from a truckload of soybeans in Fargo, N.D., last December.

China currently buys nearly a third of the U.S. soybean crop — but the country plans to impose tariffs, in response to a Trump administration plan. Here, a worker takes a sample from a truckload of soybeans in Fargo, N.D., last December.