US soybean farmers are seeking firmer assurances on agricultural purchases from China, despite previous pledges made by Presidents Xi and Trump. Recent meetings have yielded no specific announcements regarding soybean exports.

Across the vast United States, soybean farmers caught in the crossfire of the US-China trade war hoped for a deal on the crop when US President Donald Trump met with his Chinese counterpart Xi Jinping. There was optimism after the two presidents met in Busan, South Korea, in October, when China committed to increased soybean purchases. This time, however, Trump left Beijing without any concrete agricultural announcements, much less one about US farmers’ biggest export. Instead, a general...