Reviewed September 2026 against USDA Agricultural Marketing Service, USDA National Agricultural Statistics Service, and University of Illinois farmdoc daily.

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Ammoniacal Nitrogen & Ammonium Nitrate Fertilizer: Content, Price, and Use

Ammoniacal nitrogen is the fraction of a fertilizer’s nitrogen that exists as the ammonium ion (NH₄⁺) rather than as nitrate (NO₃⁻). Ammonium nitrate fertilizer is one specific product built from both forms at once: it runs 34% total nitrogen, split roughly half ammoniacal and half nitrate, according to CF Industries and Mosaic Crop Nutrition product data (CF Industries). That 17% ammoniacal / 17% nitrate split is documented in Michigan State University Extension’s nitrogen fertilizer reference (MSU Extension). This page walks through that chemistry, what it costs right now in US spot markets, and how to apply it without losing nitrogen to leaching or volatilization.

Ammoniacal Nitrogen vs. Nitrate Nitrogen

“Ammoniacal nitrogen” is not a product name — it’s a chemistry category. Any fertilizer that supplies part or all of its nitrogen as NH₄⁺ carries an ammoniacal nitrogen fraction, and that fraction behaves differently in soil than nitrate does:

• Cation exchange retention: NH₄⁺ carries a positive charge and binds to negatively charged clay and organic-matter particles in soil, which slows leaching relative to the mobile NO₃⁻ ion.
• Delayed nitrification: soil bacteria (Nitrosomonas, then Nitrobacter) convert ammonium to nitrate over days to weeks, depending on soil temperature and moisture — so ammoniacal nitrogen acts as a short-term reservoir rather than an instant release.
• Volatilization risk: surface-applied ammoniacal sources can lose nitrogen as ammonia gas if not incorporated, particularly anhydrous ammonia and urea-based blends on high-pH soils.

Ammonium nitrate fertilizer is the specific product searched for most often alongside “ammoniacal nitrogen” because it’s the classic 50/50 case: half its nitrogen behaves like the ammoniacal description above, half acts like immediately mobile nitrate. That’s covered in full in the next section.

Ammonium Nitrate Fertilizer Analysis: The Numbers

The nitrogen content of ammonium nitrate fertilizer is 34% by weight, per current CF Industries and Mosaic product specifications (CF Industries). Of that 34%, roughly 17 percentage points are ammoniacal nitrogen (NH₄-N) and the remaining 17 are nitrate nitrogen (NO₃-N) — a straight 50/50 split confirmed by Michigan State University and University of Florida extension nitrogen references (MSU Extension). That’s the “fertilizer analysis” figure people are searching for: 34-0-0 on the bag, 17% of it acting as a slower-release reservoir and 17% available to roots immediately.

Why that dual supply matters agronomically:

• Immediate uptake: the nitrate half is already root-available on application — no microbial conversion step needed, useful for a crop already showing nitrogen stress.
• Buffered supply: the ammoniacal half converts gradually, spreading nitrogen availability over the following one to three weeks depending on soil temperature.
• High N-demand fit: corn is the crop this matters most for in the US. Corn accounts for 78% of national nitrogen fertilizer use, according to USDA NASS’s 2024 Illinois nitrogen-use survey release (USDA NASS Illinois), and average corn nitrogen application in the US ran 151.8 lbs/acre in 2024, per USDA ERS (USDA ERS).

Handling and Storage

Ammonium nitrate is an oxidizer, not an explosive on its own, but the same properties that make it agronomically useful (high N density, water solubility) also make bulk storage subject to fire-code and security scrutiny in the US. Farm-scale storage volume, ventilation, and separation-from-fuel requirements are set at the state and local fire-marshal level rather than by a single federal agricultural rule; if you store bulk ammonium nitrate on-farm, check with your state fire marshal’s office or local emergency management agency for the current threshold that triggers a reporting requirement in your county — this varies by jurisdiction and isn’t something a single national figure can answer.

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Current Prices: Ammonium Nitrate, Urea, Anhydrous, UAN

Nitrogen fertilizer prices move weekly with natural gas costs (the main input to ammonia synthesis) and seasonal demand. Here’s the most recent USDA-sourced spot data available at time of writing:

• Ammonium nitrate: $555/ton, Alabama spot market, April 2025 — USDA Agricultural Marketing Service (USDA AMS).
• Anhydrous ammonia (82% N): $786/ton average, Illinois, August 2025 — USDA AMS via farmdoc daily (farmdoc daily).
• Urea: $594/ton average, Illinois, August 2025 — same source.
• Liquid nitrogen (UAN): $431/ton average, Illinois, August 2025 — same source.

Two things to note when comparing these: they’re from different states and different months, so they aren’t a perfectly matched basket — Alabama ammonium nitrate pricing reflects a different regional market than the Illinois figures for the other three. And these are spot snapshots, not forecasts. USDA-AMS regional production cost reports refresh biweekly at ams.usda.gov/mnreports — search your state name (Iowa, Nebraska, Pennsylvania, etc.) for the current Production Cost Report before you buy. USDA NASS’s annual Fertilizer Use and Price survey, which sets the national benchmark, publishes each February at quickstats.nass.usda.gov; the next release covering the prior year lands February 2026.

Scaled up, the US nitrogenous fertilizer market was valued at $11.76 billion in 2025, per Precedence Research (Precedence Research) — useful context for why even small per-ton price swings move real money at the farm level.

How to Use Ammonium Nitrate Fertilizer

Ammonium nitrate is granular, water-soluble, and can go on by broadcast spreader, banded side-dress, or dissolved for fertigation. The practical sequence:

1. Set your target rate from a soil test, not a rule of thumb. University of Illinois’s Maximum Return to Nitrogen (MRTN) calculator recommends up to 180 lbs N/acre for Illinois corn going into the 2026 crop year, per farmdoc daily (farmdoc daily) — but MRTN is county- and price-specific, so run your own numbers rather than borrowing Illinois’s.
2. Convert product rate to nitrogen rate. At 34% N, one ton (2,000 lbs) of ammonium nitrate supplies 680 lbs of actual nitrogen. To hit 150 lbs N/acre you need roughly 441 lbs of product per acre (150 ÷ 0.34). The calculator below does this conversion for your own numbers.
3. Split the application if the crop’s demand window is long. Because half the nitrogen is already nitrate and mobile, a single large application ahead of a wet period risks more loss than splitting into a pre-plant pass plus a side-dress pass at V6–V8 corn growth stage.
4. Incorporate or irrigate in within 24–48 hours on exposed, high-pH soils to limit volatilization loss, even though ammonium nitrate volatilizes less readily than urea or anhydrous ammonia.
5. Keep it away from fuel, organic material, and ignition sources in storage, and confirm your state’s specific bulk-storage threshold with your local fire marshal before scaling up on-farm storage.

Other Ammoniacal Nitrogen Forms

Ammonium nitrate isn’t the only ammoniacal source. The other common ones:

• Ammonium Sulfate — roughly 21% N and 24% sulfur by weight; useful where sulfur is limiting or on alkaline soils where its acidifying effect helps. See our guide on managing acidic soil for plants for the flip side of that effect.
• Ammonium Chloride — roughly 26% N, used where chloride nutrition is wanted alongside nitrogen.
• Anhydrous ammonia — 82% N, the most concentrated common form and the cheapest per unit of N at $786/ton in Illinois in August 2025 (farmdoc daily, above), but it requires injection equipment and carries the highest volatilization risk of the group if not sealed into the soil properly.
• UAN solutions (liquid nitrogen) — typically 28% or 32% N, blend of urea and ammonium nitrate in solution, priced at $431/ton in Illinois in August 2025 for the liquid form (farmdoc daily, above); easy to apply through fertigation but the lowest N-density of the group, meaning higher hauling volume per unit of nitrogen delivered.

For the seven practical uses these nitrogen sources get put to on working farms, see 7 Yield-Boosting Uses of Ammonia Nitrate Fertilizer.

Comparison Table: Ammoniacal Forms Side by Side

Urea and anhydrous ammonia prices above are Illinois August 2025 figures from farmdoc daily; ammonium nitrate is an Alabama April 2025 figure from USDA AMS — treat the price column as a snapshot from two different regional markets and re-check both AMS reports for your own state before comparing costs per unit of nitrogen.

Nitrogen Rate & Cost Calculator

Enter your target nitrogen rate and the current ammonium nitrate price to see product rate per acre and total cost.

Assumes ammonium nitrate is the sole nitrogen source, no credit taken for residual soil N, manure, or legume history, and a flat product price with no freight or application cost added. Re-run with your own soil-test-based rate and your local USDA-AMS spot price.

Where Ammonium Nitrate Comes From

All ammoniacal nitrogen fertilizers trace back to the same starting point: ammonia (NH₃) synthesized from atmospheric nitrogen (N₂) and hydrogen (H₂) via the Haber-Bosch process. That ammonia is then reacted with nitric acid to produce ammonium nitrate, reacted with sulfuric acid to produce ammonium sulfate, or used directly as anhydrous ammonia or urea feedstock.

• Key inputs: N₂ from air, H₂ historically from natural gas (steam methane reforming); a growing share of new capacity is exploring electrolysis-based "green" hydrogen powered by renewable electricity, though this remains a minority of US production capacity.
• Primary byproduct: water (H₂O).
• Traceability: for supply chains that need to document input provenance end-to-end, see Farmonaut Traceability Solutions.

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Agronomic and Environmental Tradeoffs

Ammoniacal nitrogen's soil-binding behavior cuts leaching risk relative to straight nitrate, but it isn't loss-free:

• Leaching: lower than nitrate-only sources because NH₄⁺ adsorbs to soil colloids, but the nitrate half of ammonium nitrate is exactly as leaching-prone as any other nitrate source.
• Volatilization: a real risk for surface-applied, unincorporated anhydrous ammonia and urea on high-pH or calcareous soils; ammonium nitrate's risk here is lower because it isn't a gas and doesn't hydrolyze to ammonia the way urea does.
• Nitrous oxide emissions: can rise under wet, oxygen-poor soil conditions regardless of nitrogen source, as nitrification and denitrification both produce N₂O as a byproduct.
• Efficiency trend: US corn production used 20% less nitrogen per bushel produced in 2024 than in 2002, driven by improved genetics, timing, and rate management — landing at 0.85 lbs N per bushel in 2024, per farmdoc daily and USDA NASS (farmdoc daily).

Two things the published data does not currently answer, worth knowing before you assume otherwise: there is no widely published peer-reviewed study isolating corn or wheat yield response to ammonium nitrate specifically (most trials report total-N response regardless of source), and there is no consolidated leaching/runoff dataset comparing ammonium nitrate against other N sources under US soils and climates. If those numbers matter to your operation, a state extension nutrient-management trial local to your soil type is the more reliable source than a national average.

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A Durable Checklist for Any Ammoniacal Nitrogen Decision

Prices and even MRTN recommendations will drift year to year, but this sequence doesn't expire:

1. Pull a current soil test before setting any N rate — don't apply on a flat per-acre assumption.
2. Check your state's current MRTN or equivalent university rate tool, not a number from a prior season.
3. Compare cost-per-lb-of-N across ammonium nitrate, urea, anhydrous, and UAN using that week's USDA-AMS regional report, not a remembered price.
4. Match application method to the ammoniacal share of your chosen product — higher ammoniacal fractions and anhydrous ammonia need incorporation; higher nitrate fractions tolerate surface application better but leach faster in wet conditions.
5. Re-check your state and county storage/handling rule directly with the fire marshal if you're scaling up bulk storage, since this is not federally standardized.

Precision Application and Monitoring

The MRTN-style rate tools above tell you how much nitrogen to apply on average across a field or county. Satellite and remote-sensing tools go a step further by showing where within a field nitrogen is actually short, which matters because ammoniacal and nitrate forms respond on different timescales to a mid-season correction.

• Smart, remote-sensing-driven application: NDVI and similar vegetation indices (available through the Farmonaut Platform) flag in-field variability that a flat per-acre rate misses.
• API access: developers integrating satellite data into their own agronomy tools can use Farmonaut Agri-API and the accompanying Farmonaut API Developer Docs.

For supply-chain-level tracking of fertilizer inputs from purchase through field application, Farmonaut's Blockchain Traceability secures data integrity from farm inputs — including ammoniacal nitrogen sources — through to consumer shipment.

Monitoring Nitrogen Status From Satellite

Farmonaut doesn't sell or regulate fertilizer. What the platform does is give growers and agribusinesses the field-level visibility to decide where and when ammoniacal nitrogen inputs like ammonium nitrate are actually needed:

• Satellite-Based Monitoring: NDVI and soil health analytics to flag in-field nitrogen stress before yield loss is visible on the ground.
• AI-Driven Advisory (Jeevn AI): nutrient-timing recommendations tailored to field-level conditions rather than a blanket county average.
• Blockchain Traceability: input-to-shipment data integrity for operations that need to document fertilizer sourcing.
• Environmental Impact Tools: carbon-footprint tracking tied to fertilizer and fuel use.
• Fleet and Resource Management: logistics optimization for large-scale fertilizer distribution and application scheduling.

The platform is accessible across web, Android, and iOS, with API integrations available for custom workflows.

Ready to scale digital transformation in your agri-enterprise or support your farming operations?

Frequently Asked Questions

Bottom Line

Ammoniacal nitrogen is the ammonium-form fraction of nitrogen fertilizer, and ammonium nitrate is the product that supplies it in a 50/50 split with nitrate at 34% total N. What changes year to year is price and the recommended rate; what doesn't change is the method — soil test, current university rate tool, current USDA-AMS price comparison across product types, and application matched to the ammoniacal share of whatever product you choose. Use the checklist and calculator above with your own current numbers rather than a number from this page a year from now.

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