Geopolitical turmoil is driving fertilizer prices up 30%, forcing tough crop choices, former USDA chief economist Seth Meyer told Fortune. “A bad decision this year could be pretty costly.”

The Iran conflict is disrupting fertilizer shipments through the Strait of Hormuz, raising supply concerns and potentially increasing global food inflation.

Geopolitical turmoil is driving fertilizer prices up 30%, forcing tough crop choices, former USDA chief economist Seth Meyer told Fortune. “A bad decision this year could be…

A few fertilizer stocks still stand to gain ground amid shipping disruptions, according to Jefferies.