Ammonium Sulfate Fertilizer (21-0-0-24S): Benefits, Applications & Global Supply by Iran Chemical Mine
What Is Ammonium Sulfate Fertilizer?
Ammonium sulfate ((NH₄)₂SO₄) is a widely used nitrogen and sulfur fertilizer containing:
- 21% Nitrogen (N)
- 24% Sulfur (S)
It is highly water-soluble, fast-acting, and particularly effective in alkaline and sulfur-deficient soils. Because it delivers two essential nutrients in one compound, it is considered a cost-efficient and agronomically reliable fertilizer for modern agriculture.
Why Nitrogen and Sulfur Matter in Crop Production
Nitrogen (N)
Nitrogen drives vegetative growth, chlorophyll production, and protein synthesis. Crops lacking nitrogen show yellowing leaves and weak growth.
Sulfur (S)
Sulfur supports enzyme activity, amino acid formation, and oil production in oilseed crops. Sulfur deficiency leads to pale leaves and reduced yield.
Modern intensive farming has increased sulfur deficiency globally, making ammonium sulfate increasingly important in fertilization programs.
Technical Specifications of Ammonium Sulfate (Typical Analysis)
| Property | Specification |
|---|---|
| Nitrogen (N) | 21% min |
| Sulfur (S) | 24% min |
| Moisture | Max 1% |
| Appearance | White crystalline or granular |
| Solubility | Highly soluble in water |
| pH Effect | Acidifying |
Comparison: Ammonium Sulfate vs Other Nitrogen Fertilizers
| Fertilizer | Nitrogen % | Sulfur % | Soil pH Effect | Volatility Risk | Best Use |
|---|---|---|---|---|---|
| Ammonium Sulfate | 21% | 24% | Acidifying | Low | Alkaline soils, sulfur-deficient areas |
| Urea | 46% | 0% | Neutral to slightly acidic | High if surface applied | General nitrogen supply |
| Ammonium Nitrate | 33–34% | 0% | Slightly acidic | Medium | Fast nitrogen release |
| Calcium Ammonium Nitrate (CAN) | 26–27% | 0% | Neutral | Low | Balanced nitrogen application |
Key Advantage: Ammonium sulfate provides sulfur, which most nitrogen fertilizers lack.
Agricultural Applications
Ammonium sulfate fertilizer is widely used in:
Cereal Crops
Wheat, rice, corn — improves protein content and grain yield.
Oilseeds
Sunflower, canola — sulfur enhances oil production.
Vegetables
Onion, garlic, cabbage — improves growth and flavor quality.
Alkaline Soils
Ideal for high pH soils common in Middle East, Africa, and Central Asia.
Global Market Demand & Export Opportunities
The global demand for ammonium sulfate fertilizer continues to grow due to:
- Rising sulfur deficiency in agricultural soils
- Expanding cereal production in Asia
- Increased oilseed cultivation
Major Importing Regions
- India
- China
- Southeast Asia
- Turkey
- African agricultural markets
Major Exporting Countries
- China
- Iran
- Russia
- European producers
Iran Chemical Mine is positioned as a reliable supplier for regional and international markets with competitive pricing and consistent quality control.
Packaging & Supply Options by Iran Chemical Mine
Iran Chemical Mine supplies ammonium sulfate in:
- 25 kg PP bags
- 50 kg bags
- 500 kg jumbo bags
- 1000 kg jumbo bags
- Bulk shipments
All products are export-ready with international quality inspection and customizable packaging options.
Storage & Handling Guidelines
- Store in dry, ventilated warehouses
- Avoid moisture exposure
- Use protective equipment during handling
- Prevent contamination with incompatible materials
Due to its hygroscopic nature (ability to absorb moisture), proper storage conditions are essential.
Frequently Asked Questions (FAQ)
What is the formula of ammonium sulfate fertilizer?
The chemical formula is (NH₄)₂SO₄.
Why is ammonium sulfate good for alkaline soil?
It has an acidifying effect, helping reduce soil pH and improving nutrient availability.
Does ammonium sulfate increase crop yield?
Yes. It enhances protein synthesis, chlorophyll production, and overall plant growth when sulfur deficiency exists.
Can ammonium sulfate be mixed with other fertilizers?
Yes. It is commonly blended with urea, DAP, or NPK fertilizers to create balanced nutrient programs.
Is ammonium sulfate suitable for all crops?
It is suitable for most crops but should be carefully managed in already acidic soils.
Why Choose Iran Chemical Mine as Your Supplier?
Iran Chemical Mine offers:
- Consistent 21% Nitrogen / 24% Sulfur quality
- Competitive export pricing
- Flexible packaging options
- Reliable logistics support
- Long-term supply contracts
Our focus is on delivering agricultural-grade ammonium sulfate that meets international standards and supports sustainable crop productivity worldwide.
