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NPK Complex Fertilizers

Balanced compound fertilizer grades for crop- and soil-specific programs.

Commercial overview

Contract basis,
clearly defined.

RDN can structure standard and custom NPK grades. The 15-15-15 FAO reference below illustrates how total nutrients, soluble phosphate, moisture and granulometry are controlled.

Reference basisIllustrative NPK 15-15-15 reference
Detailed specification

Quality acceptance matrix

Values are commercial reference points—not an offer or automatic guarantee. Use the current official standard and agreed contract schedule for procurement.

ParameterReference requirementTest method / basis
Total nitrogen15% minimumRecognized fertilizer analysis
Neutral ammonium citrate soluble P₂O₅15% minimumRecognized fertilizer analysis
Water-soluble P₂O₅12% minimumRecognized fertilizer analysis
Water-soluble K₂O15% minimumRecognized fertilizer analysis
Moisture1.5% maximumGravimetric
Particle size90% between 1–4 mmSieve analysis
Material below 1 mm5% maximumSieve analysis
MicronutrientsOnly as declared and verifiedICP / approved method
FormFree-flowing complex granulesVisual
Other grades17-17-17, 19-19-19 and custom schedules by contractContract
Applications

Where the product is used

  • Balanced basal nutrition
  • Horticulture
  • Fertilizer distribution programs
  • Custom crop formulations
Required documents

Transaction file

  • Certificate of analysis by batch
  • Declared nutrient schedule
  • Safety data sheet
  • Origin and packing documents
  • Destination registration where required
Primary reference

Verify the current edition

Standards are revised over time. Procurement must confirm the current edition and destination law.

FAO fertilizer specifications ↗
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