US Farmers Switching Corn to Soybeans as Costs Spike

Somewhere in Iowa this week, a farmer is deciding whether to plant corn or soybeans. The decision sounds routine. It isn't. It's a bet on the next 18 months of global food prices — and right now, the fertilizer crisis is forcing that bet in one direction.

USDA projected back in February that corn plantings would fall to 94 million acres in 2026, down from 98.8 million last year, while soybean acres would rise to 85 million. That was before the Strait of Hormuz closed. Before urea prices spiked 30%. Before Russia banned ammonium nitrate exports on March 24.

The USDA's Prospective Plantings Report drops Tuesday, March 31. It will capture farmer intentions as of early March — already outdated. The real decisions are being made right now, in the final days before tractors hit the fields.

The double squeeze

Two shocks hit nitrogen supply in rapid succession.

First, Iran's closure of the Strait of Hormuz choked off 25-35% of the world's seaborne urea and ammonia trade. Middle East granular urea prices jumped nearly 50% in late February and early March, with some futures touching $745 per ton.

Then on March 24, Russia suspended ammonium nitrate exports until April 21. Moscow framed it as securing domestic supply for its own planting season. The market read it differently: Russia controls roughly 40% of global ammonium nitrate trade, and the timing — right as US farmers finalise spring purchases — maximised the pressure.

The global fertilizer price index surged 21% in the first three weeks of March alone.

In US retail markets, the damage is concrete. UAN28 (the liquid nitrogen blend most farmers apply) hit $473 per ton as of March 27, up 15% month-over-month. Anhydrous ammonia reached $931 per ton. Urea at the port of New Orleans is up 25-30% from late February.

"The fertilizer cost and fertilizer availability are the main drivers right now," said Rich Nelson, chief strategist at Allendale, speaking to Reuters.

The acreage flip

Corn is nitrogen-hungry. Soybeans fix their own nitrogen from the air through root bacteria. When nitrogen fertilizer gets expensive, the economics of corn collapse. Farmers switch.

This is what the industry calls an "acreage flip" — and it's happening across the Midwest right now.

USDA's February projections already showed the trend: 4.8 million fewer corn acres, 3.8 million more soybean acres compared to 2025. But those numbers were calculated before the worst of the price spike. Analysts expect the actual shift to be larger.

The break-even price for corn — the price a farmer needs to cover all costs — sits between $4.70 and $4.90 per bushel, according to CME Group analysis. That's at or above current market prices. In other words, many corn farmers are already projected to lose money this season before a single kernel goes in the ground.

NPR reported that some farmers had been holding out for lower fertilizer prices this spring. Instead, urea spiked 30% when Iran shut Hormuz, and Russia's ban sealed the ceiling.

Barry Ward, an agricultural economist at Ohio State University, told Brownfield Ag News that ongoing price volatility "could shift U.S. corn and soybean planting decisions in 2026." He's understating it. The shift is already underway.

Why it matters in 2027

This is where the story stops being about farmers and starts being about grocery prices.

Corn is the foundation crop of the American food system. It feeds cattle, pigs, and chickens. It's processed into sweeteners, ethanol, starch, and oil. It's in roughly 75% of processed food products on supermarket shelves.

Less corn planted in spring 2026 means less corn harvested in autumn 2026. Smaller harvests tighten supply going into 2027. And corn supply affects meat prices — because it takes months for reduced feed supply to work through livestock cycles.

The decisions being made this week and next are irreversible. Once a soybean goes in the ground, it can't become a corn field until next year. The planting window is measured in weeks, not months.

The $11 billion in emergency Fertilizer Burn Adjustment (FBA) payments the government distributed covers roughly 10% of increased input costs, according to industry groups. Helpful, but not enough to change the calculus for most operations.

The invisible half of the crisis

US and European media cover the price impact on American and European farmers. What they cover far less: the same fertilizer squeeze is hitting countries that can't afford $931-per-ton ammonia at all.

Sub-Saharan Africa uses a fraction of the fertilizer per hectare that American farms do. The continent's farmers were already stretched before the Hormuz blockade. Now they're competing for the same shrinking global supply against buyers who can pay multiples of what African markets can bear.

The editorial filter's Albis scan this week scored the fertilizer story at PGI 8 — with US and EU media covering prices, but Africa "invisible despite 52.8 million facing hunger." South Asian and Latin American coverage is thin. The people least able to absorb higher food costs are the least visible in global reporting.

Carnegie Endowment noted that the president of the American Farm Bureau Federation wrote a "plaintive letter" to President Trump warning about fertilizer access. When the largest US farm lobby is writing distress letters, the situation for farmers in Nigeria and Kenya — who have no equivalent political voice in Washington — is worse by orders of magnitude.

What the USDA report won't show

Tuesday's Prospective Plantings Report will survey farmer intentions from early March. That data is already three weeks behind reality. The Russia export ban hadn't happened. The second round of strikes on Qatar's Ras Laffan — which further disrupted helium and LNG supply — hadn't happened.

Over the past five years, USDA's Prospective Plantings has underestimated final corn acreage by an average of 1.6 million acres, while overestimating soybean acres by 1.9 million. In a normal year, that variance matters at the margins. In 2026, the baseline itself is shifting faster than the survey can capture.

DTN analyst Todd Hultman called it "one of the most important" planting reports in years. He's right — but what it measures is already history.

The real report is being written in fields across the Midwest right now. Every farmer who switches a field from corn to soybeans is writing one line of it. Those lines add up to a story that won't be fully told until autumn harvest — and won't be fully felt until 2027 grocery shelves.

The convergence point

Trump's April 6 deadline to Iran — reopen Hormuz or face attack — sits eight days away. Russia's ammonium nitrate ban runs until April 21. US planting season opens in the next two to three weeks.

All three timelines converge in early April. If Hormuz reopens, fertilizer supply loosens and late-season adjustments remain possible. If it doesn't, the acreage flip hardens into permanent reality.

The cascade pattern Albis has tracked throughout this crisis keeps repeating: an energy shock becomes a fertilizer shock becomes a planting shock becomes a food shock. Each step happens on a longer timeline. Each step is harder to reverse.

The energy shock hit in late February. The fertilizer shock hit in March. The planting shock is happening right now. The food shock arrives in 2027.

The only question is how much of it is already locked in.