Fertilizers
18-46-0 · N–P₂O₅–K₂O
Di-ammonium Phosphate (DAP)
Global standard 18-46-0 DAP: a highly water-soluble, granular, phosphate-rich fertilizer used for root development, early plant growth and better yields.
- Nitrogen (ammoniacal)
- 18%
- Phosphate (P₂O₅)
- 46%
- Moisture
- 1.0–1.5% max.
- pH (1% solution)
- 7.5–8.0
| Parameter | Specification |
|---|---|
| Chemical formula | (NH₄)₂HPO₄ |
| Total nitrogen (ammoniacal) | 18% |
| Total phosphorus (P₂O₅) | 46% |
| Water-soluble phosphate | Minimum 41% (often up to 46%) |
| Moisture content | Maximum 1.0% to 1.5% |
| pH value (1% solution) | 7.5 to 8.0 (mildly alkaline) |
| Physical appearance | Granular (usually dark brown, grey or white, depending on the source) |
Importance in Bangladeshi agriculture
- Nutrient source: provides both phosphorus and early-stage nitrogen for crops such as Boro rice, wheat and vegetables.
- Root and stem growth: stimulates rapid root growth and strengthens the plant’s structure, helping prevent lodging (tipping over).
- Soil adaptability: its alkaline nature suits the low-pH and slightly acidic soils common in many regions of Bangladesh.
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- Phosphorus (P)19–23%
- Water-soluble POver 90%
- Calcium (Ca)15.5–17.1%