Soaring fertilizer prices could pressure a U.S. agricultural industry that supports 50 million jobs and over $10 trillion in output

The war in Iran could hit a heavy blow to one of the country’s largest industries, one that supports millions of livelihoods.

Now in its fourth week, the conflict has sparked the largest oil supply shock in history and sent gasoline prices soaring worldwide. But fuel products are not the only item to normally pass through the Strait of Hormuz, the critical waterway that has essentially been blockaded for almost a month.

How the Strait of Hormuz blockade is cutting fertilizer supply

Before the war...