As the conflict involving Iran continues to disrupt global shipping through the Strait of Hormuz, American agriculture faces a perfect storm of unavailable or unaffordable ammonia and urea fertilizers combined with diesel prices at multi-year highs. The Gulf region supplies nearly half of the world’s traded urea and about 30 percent of ammonia, key nitrogen sources for U.S. crops. With tanker traffic halted, prices have already jumped sharply, and supply fears are mounting just weeks before spring planting in many regions.
Urea prices at the New Orleans import hub have risen from around $516 per ton to $683 per ton in a matter of days, with some reports showing increases of 26 to 77 percent since late February. Anhydrous ammonia has climbed $100 per ton, and UAN solutions have followed suit. Diesel costs have surged as crude oil topped $100 per barrel, pushing U.S. diesel prices up 24 percent since the war began. These spikes hit farmers already operating on thin or negative margins after years of elevated inputs and subdued crop returns.
Commodity markets are reacting with higher futures for corn and soybeans as traders price in potential supply risks and inflation. Soybeans have pushed above $12 per bushel in some sessions, and corn has added risk premiums. Yet analysts note that crop price gains are not keeping pace with input costs. In one analysis, urea rose 71 percent over 90 days while corn prices gained only 2 percent. One ton of urea now equates to the value of 126 bushels of corn, up sharply from 75 bushels just months ago. Farmers face the prospect of spending more to grow the crop than they can recover at current or even modestly higher prices.
This imbalance will almost certainly drive higher food prices for American consumers. Fertilizer and fuel costs flow through every stage of the supply chain, from field to processing, transport, and retail. Estimates suggest food-at-home inflation could rise an additional 2 percentage points from these disruptions alone, on top of energy-driven increases. Grocery staples tied to corn, soybeans, and wheat, such as meat, dairy, bread, and packaged goods, stand to see the biggest impacts if yields drop or production costs remain elevated.
Many farmers may choose not to farm all of their acres this season. Corn, which requires heavy nitrogen applications, is particularly vulnerable. Some analysts project shifts of 1 to 1.5 million acres from corn to soybeans or other less fertilizer-intensive crops. Others warn of outright reductions in planted acres or scaled-back nutrient programs on existing fields, especially where pre-purchased fertilizer stocks have run out. Retailers in some areas are no longer quoting prices, leaving producers in limbo as the planting window narrows. Those who waited to buy inputs face the steepest hits and may idle marginal land to preserve cash.
Alternatives exist, though none fully replace lost nitrogen supplies in the short term. Farmers can shift rotations toward soybeans, which fix their own nitrogen and need far less synthetic fertilizer. Precision agriculture tools, including variable-rate application, soil testing, and drone monitoring, can stretch existing stocks by applying nutrients only where needed. Some may incorporate more manure or cover crops for natural fertility building, though these require planning years in advance. Longer-term options include ramping up domestic ammonia production from U.S. natural gas or securing supplies from non-Gulf sources, but logistics and timing limit immediate relief for 2026 planting.
The worst-case scenario is grim. A prolonged closure of the Strait of Hormuz could sustain fertilizer shortages through the growing season, leading to widespread yield reductions across the Corn Belt and beyond. Lower U.S. output would tighten global supplies, driving food prices higher domestically and risking shortages in import-dependent nations. Farmers already underwater could face bankruptcies or forced land sales, shrinking the sector and reducing long-term capacity. Combined with high diesel costs, transportation and harvest expenses would compound losses, potentially triggering broader rural economic pain.
This outcome can be averted through swift policy action. Prioritizing fertilizer and fuel shipments for agriculture, expanding domestic production incentives, and pursuing diplomatic resolutions to reopen key shipping lanes would help stabilize supplies. Government support programs could offset extreme cost spikes for producers who locked in plans before the crisis. Encouraging alternative nutrient strategies and investing in resilient supply chains, such as diversified import partners or advanced efficiency technologies, would build buffers against future shocks. Without these steps, the Iran conflict risks turning a manageable price cycle into a lasting setback for American farmers and consumers alike.