Ammonium Sulfate Fertilizer 21-0-0+24S
Ammonium Sulfate Fertilizer (21-0-0+24S): Our Product Information
Ammonium Sulfate (AS Fertilizer, 21-0-0+24S) is a highly efficient nitrogen and sulfur fertilizer designed to optimize crop nutrition, improve soil chemistry, and maximize agricultural productivity.
With 21% ammonium nitrogen (NH₄⁺) and 24% sulfate sulfur (SO₄²⁻), it delivers a rapid and balanced nutrient supply, making it one of the most reliable fertilizers for high-efficiency crop production systems.
Unlike urea-based fertilizers, ammonium sulfate offers lower nitrogen volatilization losses and provides immediately available sulfur, which is critical for protein synthesis, chlorophyll formation, and enzyme activation.
Technical Specifications (TDS)
| Parameter | Specification |
|---|---|
| Product Name | Ammonium Sulfate Fertilizer |
| Nutrient Formula | 21-0-0+24S |
| Nitrogen (N) | ≥21% (Ammonium-N) |
| Sulfur (S) | ≥24% (Sulfate-S) |
| Chemical Formula | (NH₄)₂SO₄ |
| Appearance | White crystalline / granular |
| Solubility | Fully water-soluble |
| Hygroscopicity | Low |
| pH Effect | Strong acidifying fertilizer |
| CAS No. | 7783-20-2 |
Key Agronomic Benefits (Scientifically Optimized)
1. Synergistic Nitrogen–Sulfur Nutrition
- Nitrogen → vegetative growth & yield formation
- Sulfur → amino acids (cysteine, methionine) & protein synthesis
2. Enhanced Nitrogen Use Efficiency (NUE)
- Adsorbs onto soil colloids → reduced leaching
- Lower volatilization compared to urea
- Sustained nutrient availability in root zone
👉 Ideal for precision agriculture and sustainable fertilization programs
3. Immediate Sulfur Availability (No Conversion Loss)
- Sulfur in sulfate form (SO₄²⁻)
- Direct plant uptake without microbial oxidation
- Eliminates lag phase common in elemental sulfur fertilizers
👉 Ensures consistent sulfur nutrition during critical growth stages
4. Soil Acidification & Nutrient Activation
- Alkaline soils (high pH)
- Calcareous soils
- Micronutrient-deficient soils
- Increased availability of Fe, Zn, Mn
- Improved phosphorus solubility
- Enhanced root nutrient uptake
5. Yield Improvement & Crop Quality Enhancement
- Increased chlorophyll content
- Stronger root systems
- Higher protein levels in crops
- Improved crop uniformity and market value
Applications & Crop Suitability
Target Crops
- Cereals: Corn, Wheat, Rice, Barley
- Industrial Crops: Cotton, Sugarcane
- Oil Crops: Soybean, Canola
- Vegetables: Tomato, Pepper, Leafy greens
- Fruit Crops: Citrus, Grapes
👉 Particularly recommended for sulfur-deficient soils, which are increasingly common due to reduced atmospheric sulfur inputs.
Application Methods
- Basal Application: Soil incorporation before planting
- Top Dressing: Rapid nitrogen supplementation
- Fertigation: Suitable for drip & sprinkler systems
- Fertilizer Blending: Ideal raw material for NPK formulations
Competitive Advantage vs Other Nitrogen Fertilizers
| Fertilizer | N Content | Sulfur | Efficiency | Recommended Use |
|---|---|---|---|---|
| Ammonium Sulfate | 21% | ✔ 24% | High | N + S balanced nutrition |
| Urea | 46% | ✘ | Medium | Low-cost nitrogen |
| Ammonium Nitrate | 34% | ✘ | Medium | Fast-release nitrogen |
👉 Strategic Insight:
Ammonium sulfate is the optimal choice for sulfur supplementation and pH management, not just nitrogen supply.
📦 Packaging & Storage
- Standard Packaging: 50kg PP woven bags / jumbo bags
- Storage Recommendations:
- Keep in dry, ventilated conditions
- Avoid moisture and caking
- Store away from alkaline substances
Frequently Asked Questions
Ammonium sulfate is a nitrogen (N) and sulfur (S) fertilizer used to promote plant growth, increase yield, and correct sulfur deficiency. It supports chlorophyll formation, protein synthesis, and improves nutrient uptake in crops.
It is highly effective in alkaline and calcareous soils because it has an acidifying effect. It helps lower soil pH and improves the availability of nutrients such as phosphorus, iron, and zinc.
It is suitable for corn, wheat, rice, soybeans, canola, potatoes, and vegetables. It is especially effective for sulfur-demanding crops and helps improve protein content and crop quality.
Compared with urea, ammonium sulfate provides both nitrogen and sulfur, reduces nitrogen volatilization loss, performs better in alkaline soils, and improves nitrogen use efficiency and crop quality.
It improves soil fertility by supplying stable ammonium nitrogen and sulfate sulfur. It also helps release nutrients in alkaline soils by gradually lowering soil pH, improving overall nutrient availability.
📝Get Free Quote
Product Catalog
- Product InformationProduct Information
- Technical Specifications (TDS)Technical Specifications (TDS)
- Key Agronomic BenefitsKey Agronomic Benefits
- Applications & Crop SuitabilityApplications & Crop Suitability
- Packaging & StoragePackaging & Storage
PRODUCTS THAT MIGHT INTEREST YOU
Agricultural-urea
Potassium Phosphite Solution
Ammonium Sulfate Nitrate
NK 42-0-5 Fertilizer
Why Choose Risso® Ammonium Sulfate?
Risso® Ammonium Sulfate (21-0-0 + 24S) is a high-efficiency nitrogen and sulfur fertilizer designed to improve crop growth, yield, and nutrient balance. It provides readily available ammonium nitrogen and sulfate sulfur to support chlorophyll formation, protein synthesis, and overall plant development. It improves nitrogen use efficiency, reduces nutrient loss compared with urea, and performs well in alkaline and sulfur-deficient soils. It is suitable for cereals, vegetables, and oilseed crops and is widely used to enhance soil fertility and achieve stable agricultural productivity.
