Farmers in northeast Wisconsin are not even in their fields yet, and you can already find many of them searching for a second option when it comes to delivering important nutrients to their future crops. The war in Iran is not just causing pain at the pump, but also pain at agronomy centers as fertilizer costs rise.

According to CNN, more than a third of the world’s fertilizer supply passes through the Strait of Hormuz, which is at the center of the international conflict. Imported urea has been at the center of the price increase, with its cost jumping by more than a third since the war started.

Rio Creek Feed Mill Operations Manager Sam Barta says urea and liquid nitrogen has jumped up in price significantly since the conflict started, in some cases by as much as $200. While some farmers prepaid for all of their fertilizer upfront, others may have to shoulder some of the increase. He hopes they are able to help farmers find the right mix to ensure crops get what they need at prices they can handle.

Barta says by taking a more layered approach that farmers that will need to purchase more fertizer in the year will be able to get some at a more reasonable price.