Single superphosphate
Single Superphosphate: A High-Quality Phosphate Fertilizer
Single Superphosphate (SSP) is a widely used phosphate fertilizer containing phosphorus, calcium, and sulfur - essential nutrients for plant growth. With over a century of agricultural application, SSP remains a cost-effective solution for improving soil fertility and crop yields.
Product Specifications
- Phosphorus Content: 16-22% P₂O₅
- Calcium Content: 18-21% CaO
- Sulfur Content: 11-12% S
- Appearance: Gray to brown granular powder
- Solubility: Water-soluble phosphorus content ≥85%
- Moisture Content: ≤4%
- Granule Size: 2-4 mm (90% minimum)
| Component | Percentage | Function |
|---|---|---|
| P₂O₅ (Phosphorus pentoxide) | 18-22% | Promotes root development and flowering |
| CaO (Calcium oxide) | 18-21% | Improves soil structure and pH balance |
| S (Sulfur) | 11-12% | Essential for protein synthesis |
| Free Acid (as P₂O₅) | ≤4% | - |
| Moisture | ≤4% | - |
Key Benefits of Single Superphosphate
Single Superphosphate offers multiple advantages for modern agriculture:
- Provides immediately available phosphorus for rapid plant uptake
- Contains secondary nutrients (calcium and sulfur) that enhance fertilizer efficiency
- Improves soil structure and microbial activity
- Suitable for a wide range of crops including cereals, oilseeds, and legumes
- Cost-effective compared to other phosphate fertilizers
- Compatible with most other fertilizers for blending applications
Application Guidelines
For optimal results with Single Superphosphate:
- Apply at rates of 150-300 kg/ha depending on soil test results
- Best applied at planting time or as a basal dressing
- Can be broadcast or band-placed near the seed
- Incorporate into soil when possible to minimize phosphorus fixation
- For perennial crops, apply annually in early spring
Single Superphosphate FAQ
What crops benefit most from Single Superphosphate?
Single Superphosphate is particularly beneficial for phosphorus-loving crops such as canola, pulses, cereals, and pasture grasses. It's also excellent for horticultural crops that require sulfur, including cruciferous vegetables (cabbage, broccoli), onions, and garlic. The calcium content makes it valuable for fruit and vegetable production where soil calcium levels are low.
How does Single Superphosphate compare to other phosphate fertilizers?
Single Superphosphate differs from other phosphate fertilizers in several ways. Unlike Triple Superphosphate (TSP) which contains higher phosphorus (44-46% P₂O₅) but no sulfur, SSP provides both phosphorus and sulfur. Compared to Diammonium Phosphate (DAP), SSP doesn't contain nitrogen but is better suited for acidic soils. SSP releases phosphorus more gradually than water-soluble fertilizers like MAP, making it less prone to leaching.
Can Single Superphosphate be used in organic farming?
While Single Superphosphate is a chemically processed fertilizer, many organic certification programs allow its use with certain restrictions. The processing involves natural rock phosphate reacting with sulfuric acid, without synthetic additives. However, organic farmers should verify with their certification body, as some programs classify SSP as a "natural input" while others consider it a conventional fertilizer.
Storage and Handling Information
Proper storage of Single Superphosphate is essential to maintain quality:
- Store in dry, covered areas to prevent caking
- Keep away from alkaline materials to prevent chemical reactions
- Use within 12 months of manufacture for optimal performance
- Wear appropriate PPE when handling (gloves, dust mask)
- Bulk density: approximately 1.0-1.2 t/m³
Quality Assurance
Our Single Superphosphate meets international quality standards including:
- ISO 6598:2005 (Fertilizers - Determination of phosphorus content)
- ASTM International standards for fertilizer analysis
- National fertilizer regulations for heavy metal content
Each batch undergoes rigorous testing for nutrient content, granule hardness, and solubility to ensure consistent performance in field conditions.