MAP 12-61-0 (Monoammonium Phosphate) is a high-phosphorus fertilizer containing 12% nitrogen and 61% phosphorus pentoxide (P2O5). It is one of the most concentrated phosphorus fertilizers available, making it highly efficient for starter applications and phosphorus-deficient soils.
MAP vs DAP: Key Differences
| Property | MAP 12-61-0 | DAP 18-46-0 |
|---|---|---|
| Nitrogen (N) | 12% | 18% |
| Phosphorus (P2O5) | 61% | 46% |
| pH Effect | Acidifying (pH 3.5) | Slightly alkaline (pH 8.0) |
| Ammonia Volatilization Risk | Low | Moderate-High |
| Best For | Acidic soils, fertigation | Alkaline soils, basal |
| Seed Safety | Excellent (safe near seed) | Moderate (band away from seed) |
When to Choose MAP Over DAP
- Acidic soils (pH below 6.0): MAP's acidifying effect helps maintain soil pH in the optimal range
- Seed-row placement: MAP is safer near seeds because it produces less free ammonia
- Fertigation systems: MAP is highly water-soluble and suitable for drip and sprinkler irrigation
- High-phosphorus requirement: MAP provides more phosphorus per kilogram than DAP
- Cold soil conditions: MAP performs better in cold, wet soils where ammonia volatilization from DAP increases
Application Methods
- Band placement: 5-7cm below and to the side of the seed row at planting — the most efficient method
- Broadcast and incorporate: Apply before planting and mix into soil 10-15cm deep
- Fertigation: Dissolve at 5-10 kg per 1000 liters for drip irrigation systems
- Blending: Mix with Urea and MOP for custom NPK formulations
Crops That Benefit Most from MAP
- Maize/Corn: Excellent starter fertilizer for rapid early root development
- Wheat: Strong root establishment in cold soil conditions
- Soybeans: Efficient phosphorus supply without excess nitrogen
- Cotton: Safe for seed-row placement with good phosphorus availability
- Vegetables: Rapid establishment in transplant production systems
Specifications
- Total Nitrogen (N): 12.0% minimum
- Available Phosphorus (P2O5): 61.0% minimum
- Moisture: 2.0% maximum
- Granule size: 2-4mm (90% minimum)
- HS Code: 3105.40
Export Information
Thai Fertilizer exports MAP 12-61-0 from Laem Chabang Port, Thailand. Available in 50kg bags, 25kg bags, and 1000kg jumbo bags. MOQ is one 20-foot container (approximately 25 MT). Full export documentation included: COA, Certificate of Origin, Commercial Invoice, Packing List, Bill of Lading.