Record-high diesel prices are compounding financial pressures for U.S. farmers as they work to harvest major crops like corn and soybeans. The elevated fuel costs directly impact the operation of essential harvesting and transportation equipment.

Diesel prices reached a new national average high of $5.85 a gallon on September 4, marking the first time the price surpassed that threshold. By Friday, the average price had climbed to $6.05 per gallon, according to AAA. This surge represents a 60% increase from the national average of approximately $3.76 per gallon recorded before late February.

The rise in diesel prices is linked to global fuel market disruptions stemming from the conflict with Iran, which has affected tanker traffic. Crude oil, a primary component of diesel, has seen its price skyrocket amid these global supply chain issues.

Farmers are particularly vulnerable to these price increases as they rely heavily on diesel for daily operations. Jason Kurtz, a corn and soybean farmer near Forest City, Missouri, stated that he is paying double the amount for diesel this year compared to previous seasons. His combine alone consumes about 200 gallons of fuel per day, and he anticipates operating it for approximately 30 days. Additional diesel is required for his tractor and trucks used in transporting grain.

"We have to harvest. We have to run the machines. We have to use the diesel, so it cuts into our bottom line," Kurtz said. He noted that his farm's finances were already strained due to increased costs for fertilizer and chemicals earlier in the year.

Agricultural economists point out that these higher fuel expenses affect not only harvesting but also the subsequent transport of crops from fields to farms and then to their final sale points. "Farms that are cash strapped, they're the ones that are most having to figure out what to cut to make this work," said Paul Mitchell, a professor of agricultural and applied economics at the University of Wisconsin-Madison. "There are a lot of farms facing that."

Some farmers, like Kurtz, are considering delaying non-essential farm work in the hope that diesel prices will decrease. "That's one good thing about farming. Tomorrow will be different," Kurtz remarked.