Wars are often described with maps, missiles, and ministries of defense. They are narrated in arrows, troop movements, and satellite images. But for much of rural America, the war in Iran is arriving in the form of a diesel receipt, a fertilizer quote, a delayed shipment, a hard decision about how many acres to plant, and a new calculation about whether a farm that survived the last few hard years can survive one more. Since the U.S.-Israeli strikes on Iran on February 28 and Tehran’s effective closure of the Strait of Hormuz, the conflict has moved from the realm of foreign policy into the economics of spring planting.
That may sound indirect, but agriculture is built on indirect things. A farmer in Arkansas does not have to ship grain through the Persian Gulf to be hurt by a war there. He only has to buy fertilizer. She only has to fill a diesel tank. They only have to depend on a supply chain whose weak points sit thousands of miles away. The American Farm Bureau Federation warned this month that the Strait matters to U.S. agriculture not mainly because American crops travel through it, but because it sets global prices for fuel, fertilizer, and freight.
The Strait of Hormuz is not just a distant place name in the news, the impact of that twenty-one miles has global implications. The U.S. Energy Information Administration says roughly 20 million barrels a day moved through it in 2024, equal to about 20 percent of global petroleum-liquids consumption, and about one-fifth of global LNG trade also passed through the strait, largely from Qatar. That matters on the farm because natural gas is the critical feedstock for ammonia, and ammonia is the base molecule behind much of modern nitrogen fertilizer. When energy convulses, agriculture does not stay calm for long.
The shock is no longer theoretical. Reuters reported today that the war has created the largest-ever disruption in global oil and gas supplies, with physical crude prices spiking far above futures benchmarks and the blockade cutting off nearly a fifth of global oil flows. In practical terms, that means farmers are buying inputs in a market where the usual price signals have stopped behaving normally.
For American farmers, fertilizer is where a distant conflict becomes an immediate burden. The Farm Bureau’s latest nationwide survey of more than 5,700 farmers found that 70 percent said fertilizer had become so expensive they would not be able to buy all they needed this year. Nearly six in 10 said their finances had worsened because of rising fertilizer and fuel costs. The group’s economists reported that nitrogen fertilizer prices had risen more than 30 percent since tensions escalated, urea prices were up 47 percent since the end of February, and farm diesel prices had risen 46 percent over the same stretch.
That last number matters more than it may seem. Diesel is not just another business expense in agriculture. It runs tractors, planters, sprayers, combines, grain trucks, irrigation systems, and the freight that moves fertilizer from port to warehouse to field. EIA’s April 14 update put U.S. on-highway diesel at $5.608 a gallon, with Midwest diesel at $5.382. Those are not just high prices. They are the kind that force farmers to calculate the cost of every trip across the field.
The bleakness of the moment owes a lot to timing. If this had happened during a strong farm cycle, many producers would still be angry, but fewer would be frightened. Instead, it arrived as the sector was already entering 2026 with margins under pressure. USDA’s Economic Research Service forecast net farm income at $153.4 billion for 2026, down 0.7 percent nominally and 2.6 percent after inflation from 2025. That was before the full shock of wartime fertilizer and fuel volatility could be fully measured.
That is why this conflict feels especially painful in farm country: it is not introducing a brand-new hardship so much as adding fresh pressure to burdens that were already there. Farmers had already been navigating low crop prices, accumulated debt, inflation, and the slow emotional fatigue of doing everything right and still watching margins disappear. The war has not rewritten that story. It has sharpened it. Farm Bureau’s survey found that 94 percent of respondents said their financial condition had either worsened or stayed the same from last year.
The burden is not evenly distributed. One of the more revealing details in the Farm Bureau data is regional timing. In the Midwest, where corn-and-soybean rotations often lead farmers to lock in fertilizer purchases earlier, 67 percent reported pre-booking fertilizer ahead of the season. In the South, only 19 percent did. That difference has turned into a line between being bruised and being exposed. Almost 8 in 10 Southern farmers said they could not afford all the fertilizer they needed this year, compared with 48 percent in the Midwest. Small farms are also more vulnerable than larger ones, because they are less likely to have locked in purchases or to have the cash flow to absorb sudden spikes.
The commodity mix matters too. Corn is especially sensitive because it is more fertilizer-intensive than soybeans, and the Farm Bureau says more than 80 percent of rice, cotton, and peanut producers reported they could not afford all the fertilizer they needed. Its survey also found lower pre-booking rates among cotton and peanut growers, leaving many Southern producers hit by both crop economics and timing.
None of this means America is about to run out of fertilizer tomorrow. The United States produces a meaningful share of its own supply. But it does rely on global trade for important pieces of the system. The Fertilizer Institute said last month that the share of domestic supply most exposed to the conflict is roughly 10 percent for ammonia, 35 percent for urea, 40 percent for processed phosphates, and 10 to 20 percent for sulfur. That is not dependence in the simplistic sense. It is interdependence—and in a wartime market, interdependence can be punishing enough.
That helps explain why so much of the distress in rural America has less to do with literal shortage than with uncertainty. Farmers can manage a lot if they know the rules. They can hedge, pre-book, delay, switch acres, or revise plans. What is much harder to manage is a market in which the cost of a nutrient can jump before the next delivery window, or in which supplies already purchased might get rerouted, delayed, or repriced. IFPRI warned on April 1 that shipping restrictions in the Strait had already pushed fertilizer and energy prices sharply higher and that the war was threatening food systems through those two channels above all.
The effects are already beginning to show up in planting intentions, even if the full picture is still forming. USDA’s March Prospective Plantings report said farmers intended to plant 95.3 million acres of corn in 2026, down 3 percent from last year, while soybean acres were expected to rise 4 percent. Because the survey was conducted in the first half of March, that report likely captured only the early phase of the conflict’s farm-level consequences, not the full weight of what followed.
This is the part of the story that matters beyond the countryside. When fertilizer gets expensive enough, the question is not whether farmers make less money. It is whether they apply less of it, switch crops, cut acres, or accept lower yields. Farm Bureau economists warned that if disruptions persist, farmers’ adjustments to fertilizer use and purchasing could reduce yields, shift acreage, and lower production potential in the 2026 crop year. That is how a war abroad becomes a kitchen-table story at home—not necessarily through empty shelves, but through tighter supplies, higher food and feed costs, and another season in which more of the food economy feels brittle.
There is irony in all of this. The United States is a major oil and gas producer. Reuters even reported this week that the Iran war has pushed America close to becoming a net crude exporter for the first time since World War II. And yet that national strength has not translated into calm at the farm gate. Farmers do not buy “American energy”. That's not how the system works. They buy into global markets, at global prices, through local suppliers, on local timelines, with their own narrow planting windows closing around them.
That is why the war in Iran matters to the American farming community, and why the usual way of talking about war can miss what it does. This conflict impacts ports, pipelines, barges, invoices, and growing seasons. It changes what Americans can afford, what they can risk, and what kind of year they are likely to have before the first seed is fully in the ground. In Washington, the war is debated as strategy. But for everyday American, it is being lived as the cost of war.
And that may be the most unsettling part of the whole picture. For decades, many Americans have been able to imagine war as something the country wages “over there,” while everyday life continues more or less intact “over here.” Farmers know better. They know that what happens in a distant strait can reach a corn field in Iowa, a cotton operation in Arkansas, or a rice farm in Louisiana with startling speed. They know that foreign policy can become fertilizer policy without anyone intending it to. And they know that when a war reaches agriculture, it does not arrive waving a flag. It arrives as a bill.
