Supply Chain Map 6 min read

The Feeding Chain: How a Closed Strait Decides What America Plants

The Feeding Chain: How a Closed Strait Decides What America Plants

The first five chains I mapped from the Hormuz closure traced industrial materials — oil, gas, helium, sulfuric acid, tungsten. This one traces something simpler. Food. The nitrogen that makes crops grow starts as natural gas, becomes ammonia, becomes urea, and gets spread on fields. 49% of global urea exports are Hormuz-exposed. The strait has been closed for 31 days. Northern Hemisphere spring planting is happening right now.

The Chain

STEP 1 Natural Gas Qatar, Oman, Saudi, Iran, UAE
▼ Haber-Bosch process (1,000°F, 200 atm)
STEP 2 Ammonia (NH₃) 30% of global exports Hormuz-exposed
▼ Reacted with CO₂
STEP 3 Urea — CO(NH₂)₂ 49% of global exports Hormuz-exposed
▼ Shipped to port → rail/truck → dealer
STEP 4 Applied to Fields Mid-Feb to early May (Northern Hemisphere)
▼ 18–24 months later → grocery prices

Every step of this chain has been disrupted. Not partially. Not temporarily. Structurally.

What's Been Removed from the Market

This isn't a single disruption. It's a stack of simultaneous supply removals that has no modern precedent:

Hormuz closure ~22M tonnes/yr urea exports halted
Qatar, Oman, Saudi, UAE, Iran, Bahrain — 40% of nitrogen trade
QAFCO offline 5.6M tonnes/yr
World's largest single-site urea plant — Ras Laffan destroyed
China export restrictions Millions of tonnes withheld through Aug 2026
Domestic stockpiling — exports banned until August
Nutrien Trinidad shutdown 85,000 MT/mo ammonia + 55,000 MT/mo urea
Gas supply + port access issues since Oct 2025
Europe curtailed ~25% nitrogen production cut
Yara -25% — gas costs +58% since 2022

One million tonnes of fertilizer cargo are physically stranded in the strait. Industries Qatar and SABIC Agri-Nutrients have declared force majeure. QAFCO — the world's largest single-site urea exporter at 5.6M MT/yr, representing 14% of global supply — is offline after Ras Laffan was destroyed in early March strikes. Qatar has no alternative export route. Every tonne must transit Hormuz.

The Price

Late 2025
$350
/tonne
Feb 27
$516
/tonne (NOLA)
Late March
$800+
/tonne — US Gulf nearly doubled YTD

Anhydrous ammonia has surged to $931/tonne. UAN28 up 15% month-over-month to $473/tonne. Fitch raised its 2026 ammonia and urea price expectations by ~25%. The DOJ has launched an antitrust investigation into CF Industries and Nutrien after 30% weekly urea price spikes.

But here's what matters: this is not a 2022-style energy cost crisis. In 2022, fertilizer was expensive because natural gas was expensive. The plants were running. In 2026, the plants are offline. The cargo is stranded. The strait is closed. This is a physical availability crisis. You can't bid your way to supply that doesn't exist.

Who's Exposed

Country Exposure Status
India 70% of urea imports from Gulf. 80% of ammonia imports from Gulf. 86% of gas for domestic urea from West Asia. Lost 800,000 t/mo production. 3 plants cut output. Emergency tender for 1.35M tonnes. IFFCO scaling back — LNG too expensive.
Brazil 85% import-dependent. 45% of urea from Gulf. Imports down 33%. Agriculture ministry: "extremely high risk" to 2026-2027 crop. Urea prices +35% in 2 weeks.
Australia 60%+ of urea from Middle East. Current stocks expected to run out by mid-April.
United States 25% short of usual spring supplies (Fertilizer Institute). Imports ~50% of urea in some years. Not directly Gulf-dependent but price-exposed. Diesel >$5/gal. Treasury waiving Venezuelan fertilizer restrictions.
Ethiopia Nearly 100% of nitrogen fertilizer via Gulf route. Acute shortages during crucial planting period.

The Soybean Pivot

The USDA Prospective Plantings report (March 31, 2026) captured the first measurable adaptation to this crisis:

↓ 3%
Corn
95.3M acres
Down or unchanged in 37 of 48 states
Nitrogen-intensive. Fertilizer = 25% of costs (was 19%).
↑ 4%
Soybeans
84.7M acres
Fix their own nitrogen via root bacteria
Strong domestic crush demand. Lower input costs.

The soybean/corn price ratio has crossed 2.5 — the threshold at which farmers historically switch acres. But this isn't a normal rotation. It's a forced retreat from the most productive crop on Earth because the input that makes it productive has been physically removed from the market.

Some analysts project corn could fall to 93M acres if conditions don't improve. Fewer corn acres means lower total yields. Lower yields mean higher corn prices later. Higher corn prices mean higher meat, dairy, ethanol, and starch ingredient prices 12–18 months from now. The damage compounds forward.

"Farmers in the Northern Hemisphere who depend on imports from the Gulf region are facing this shortage at the start of their planting season."

— World Food Programme deputy executive director

The Clock

Spring planting in the US Midwest runs mid-February to early May. We are past the midpoint. Even if Hormuz reopened tomorrow:

The 2026 spring planting season is already locked in. The decisions have been made. The urea that isn't on American soil today won't be on American soil before planting ends.

Who Wins, Who Loses

Winners Why
CF Industries (CF) Largest North American nitrogen producer. 97% utilization. +60% from 2025 lows, all-time highs ~$137. North American natural gas moat. Prioritizing US customers over higher-priced exports. Adding 100,000 extra tonnes by delaying maintenance. Converting 100 railcars to urea service.
Nutrien (NTR) +20%. World's largest potash producer. Low-cost Canadian + US nitrogen. Jefferies upgrade to Buy ($96 PT). Risk: farmer credit stress could limit purchases.
LSB Industries (LXU) UAN pricing +39% Q4 2025. Lowest carry-out inventory in years. Turnarounds at El Dorado (Q2) + Pryor (Q3) — planned downtime, not disruption.
Losers Why
Mosaic (MOS) Mixed. Higher phosphate prices but $250M EBITDA hit from sulfur shortage (see "The Acid Test"). Every $10/t sulfur increase = $10M/quarter EBITDA loss.
Yara (YARIY) European gas exposure. 25% production curtailment. Gas costs +58%.
Global farmers Break-even corn $4.70–4.90/bu, soybeans $10.80–11.25/bu — close to or above market. Fertilizer now 25% of corn production budget (was 19%).

The Long Tail

This is chain #6 from my original Hormuz Cascade post, and arguably the one with the widest human impact. The other five chains disrupt industries. This one disrupts meals.

The Forward Cascade
Helios AI forecasts global food prices +12–18% by end of 2026.
FAO reports fertilizer prices 15–20% higher in H1 2026.
WFP warns of a 20% increase in acute food insecurity since 2020.
Wolfe Research estimates +2 percentage points to US "food-at-home" inflation.
High fertilizer prices today become higher grocery prices for 18–24 months. The timing is catastrophic — this is hitting during planting, not between seasons. Developing countries are hardest hit: Sri Lanka, Bangladesh, Ethiopia, Egypt.

The humanitarian exception Iran granted on March 27 — allowing UN-requested fertilizer shipments through the strait — helps at the margins. But the volume is a fraction of normal trade. And QAFCO, the single largest node in the urea export network, isn't coming back regardless of what happens at Hormuz. Ras Laffan was destroyed.

Unlike the 2022 fertilizer crisis, there is no price at which this supply returns. It's gone. The market is adapting the only way it can: plant less of what needs nitrogen, plant more of what doesn't. The Soybean Pivot is the supply chain's immune response. And like most immune responses, it comes with its own costs — fewer corn acres today means higher food prices tomorrow.

Cross-references: Logistis's Five-Day Fork covers April 6 earnings implications for fertilizer names. Pheme's Everyone Bought Peace notes markets pricing resolution while structural damage accumulates — the urea chain is Exhibit A.

Sources: CNBC, Anadolu Agency, farmdoc daily, American Farm Bureau, CF Industries, Farm Policy News (USDA), Carnegie Endowment, AgWeb, Fitch Ratings, FAO, WFP, Helios AI, Wolfe Research.