A Field-Tested Look at Calcium Ammonium Nitrate (CAN)

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If you’ve walked fields after a cool, wet spring, you know why growers keep reaching for Calcium Ammonium Nitrate. It feeds fast, but not too fast, and the added calcium quietly fixes issues you only notice later—firmer fruit, stronger stalks, steadier color. To be honest, CAN has been having a mini-comeback. Price swings in urea and chloride-sensitive crops (tomato, potato, leafy greens) nudged a lot of agronomists back to nitrate blends with a calcium kicker. I’m seeing more trials—and more satisfied notes from farm managers—than two seasons ago.

What it is and why it works

CAN is basically ammonium nitrate buffered with finely ground limestone or dolomite. That matrix reduces volatility and adds Ca (and sometimes Mg). The dual N forms—nitrate for instant uptake, ammonium for sustained feed—are the real-world advantage. Many customers say they get a cleaner greening curve and fewer blossom-end issues when calcium is short.

Typical Specifications (FIZA CAN)

Process Flow and QA (how it’s made)

Materials: ammonium nitrate melt, ground limestone/dolomite, process water, anti-caking agent. Method: granulation → drying → screening → cooling → coating → bagging. Testing: sampling per EN 1482; total N by Kjeldahl (AOAC); granule size by sieve analysis; moisture by oven-dry. FIZA runs ISO 9001 QC checkpoints at melt density, granule crush strength, and bag weight.

Where CAN delivers

• Field crops: wheat, maize, oilseed rape—topdressing pre- and post-tillering.
• Horticulture and greenhouse fertigation (chloride-sensitive lines).
• Turf and landscape: steadier color without burn, especially in heat.

Advantages: fast uptake nitrate, calcium for cell strength, low chloride, consistent prill size. Typical rates: 100–300 kg/ha per split for arable; 5–20 g/plant for vegetables—adjust after soil/tissue tests and local advice.

Vendor Snapshot (what buyers compare)

Customization and logistics

FIZA offers 2–4 mm or 3–5 mm prills, Ca/Mg balance, anti-dust/anti-cake coatings, private-label bags. Typical MOQ one container; SGS inspection on request. It seems that mid-season stock moves fastest—forecast early if you can.

Mini case notes

Tomato (greenhouse, Shandong): Switching half the N to Calcium Ammonium Nitrate in fertigation raised marketable yield ≈7–9% and reduced blossom-end rot complaints (grower-reported). Turf (UAE resort): CAN at 20 g/m² monthly kept color while cutting burn incidents versus urea, especially in shoulder-season heat.

Compliance and safe handling: store cool, dry, segregated from organics and fuels; follow local transport rules. EU 2019/1009 and REACH guidelines apply as relevant.

Citations

1. FAO. Fertilizer Manual, International Fertilizer Industry Association/FAO.
2. European Union. Regulation (EU) 2019/1009 on EU fertilising products.
3. AOAC Official Method 978.02 (Kjeldahl Nitrogen), Association of Official Analytical Chemists.
4. CEN EN 1482-1/-2: Fertilizers and liming materials — Sampling.
5. IFA. Product Stewardship and Good Practice for Nitrate Fertilizers.