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Nitrate-Sulphate Compound NPK 15-15-15

A tower-granulated compound made from ammonium nitrate solution rather than urea melt. No biuret, high nitrate nitrogen, 90% water-soluble phosphorus — built for sensitive crops and drip systems.

15-15-15N-P-K ≥7%water-soluble P 1×20'GPminimum order
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Nitrate-Sulphate Compound NPK 15-15-15

SPECIFICATION

Technical data

N-P₂O₅-K₂O15-15-15 (45% total)
Nitrate nitrogen≥7%
BiuretNone — ammonium nitrate route, not urea
Water-soluble P≥90%
ChlorideLow
Water-insoluble contentVery low, suitable for drip lines
Granule size1–3 mm, fast dissolving
Packing25 kg / 40 kg / 1,000 kg

Typical values. The contract and the lot COA govern; ranges vary by formulation and raw material lot.

What it is

A tower granulated compound produced from ammonium nitrate and sulphate of potash. Because the nitrogen never passes through a urea melt, no biuret is formed, and a large share of the nitrogen is already in nitrate form.

How it works

Nitrate is taken up directly by roots, without waiting for soil conversion. That matters in cold soils, in young root systems and in drip systems where the solution must be immediately available. Absence of biuret matters because biuret accumulates at growing points and damages root tips on banana, citrus and vegetable seedlings — damage that is easy to mistake for salinity or disease.

APPLICATION

Crops and rates

Convert kg/ha to kg/acre by dividing by 2.47. Local registration and recommendations take priority.

CropStageRateNote
BananaFlower differentiation to bunch emergence0.3–0.5 kg/plant/roundFertigation or ring trench
VegetablesTransplanting to harvest75–150 kg/ha/roundFertigation or drip
Fruit treesFruit sizing0.2–0.4 kg/tree/roundRing trench then irrigate
Ginger / turmericTwo to three rounds300–450 kg/haSensitive to ammonia burn
Nursery seedlingsTransplant establishmentLow rate, splitNitrate is safer than urea at this stage

ADVANTAGES

What you get

  • Zero biuret by process — no root damage on sensitive crops
  • High nitrate share for fast, predictable uptake
  • 90% water-soluble P, low insoluble content for drip lines
  • Tower granules dissolve quickly in the mixing tank

Before you apply

  • Do not mix with calcium or copper products in the spray tank without a jar test.
  • Before using in a drip system, dissolve a sample in your own water and check for residue.
  • Store away from heat and organic materials.

FAQ

Common questions

Why does zero biuret matter?

Biuret damages root tips and chlorophyll on sensitive crops, and the damage is permanent for the season. A nitrate route removes it at the source.

Can it be used for fertigation?

Yes. Low insoluble content and a fast-dissolving granule make it suitable, but always dissolve a sample in your own water first.

Is it suitable for banana?

Yes. Banana is one of the crops where the nitrate route and the absence of biuret show the clearest difference.

How does it compare with the chloride grade?

Higher cost, better safety and faster nitrogen. Use it where crop value justifies it, not on rice or sugarcane.

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