Ammonium Sulfate Powder (21-0-0-24S) represents the most rapidly available form of this essential dual-nutrient fertilizer. With its fine particle size and exceptional solubility, this powdered formulation delivers immediate nitrogen and sulfur nutrition to crops, making it the preferred choice for rapid deficiency correction, solution preparation, and specialized application methods. For growers, formulators, and agronomic professionals seeking maximum solubility and quick crop response, ammonium sulfate powder provides unmatched versatility and performance.

The Powder Advantage

Maximum Solubility for Complete Dissolution

Ammonium sulfate powder dissolves almost instantly in water, achieving complete solubility at 750 grams per liter at 20°C. The fine particle size eliminates the need for extended mixing or agitation, making it ideal for rapid solution preparation. This exceptional solubility ensures that nutrients are immediately available for plant uptake, providing quick correction of nitrogen and sulfur deficiencies.

Uniform Particle Size for Consistent Solutions

Our powdered product features consistent particle size distribution, ensuring uniform dissolution and predictable solution strength batch after batch. The fine, free-flowing powder blends easily with other soluble fertilizers and additives, making it the preferred choice for custom solution preparation.

High Purity for Sensitive Applications

Manufactured to rigorous quality standards, our ammonium sulfate powder contains minimal impurities, making it suitable for sensitive crops, hydroponic systems, and high-value specialty applications. Low heavy metal content ensures crop safety, while minimal insoluble matter prevents clogging in precision application equipment.

Rapid Nutrient Release for Immediate Response

Unlike granular or coated fertilizers, ammonium sulfate powder releases nutrients immediately upon contact with soil moisture or water. This rapid availability is particularly valuable during critical growth stages, emergency deficiency correction, and situations requiring quick crop recovery.

Core Agronomic Benefits

Dual Nutrient Supply in Highly Available Forms

Ammonium sulfate powder delivers 21% nitrogen in the ammonium form and 24% sulfur in the sulfate form. Both nutrients are immediately available for plant uptake, addressing two critical nutritional requirements in a single, highly soluble application. This dual-nutrient package is particularly valuable for crops with high sulfur requirements and for rapid correction of multiple deficiencies.

Ammonium Nitrogen Advantages

The ammonium form of nitrogen provides several agronomic benefits. It is immediately available for plant uptake while being held by soil colloids, reducing leaching potential compared to nitrate nitrogen. The ammonium form also contributes to the physiological acidity of the fertilizer, which helps lower soil pH in alkaline conditions, improving the availability of phosphorus and micronutrients.

Essential Sulfur Nutrition

Sulfur deficiency is increasingly common in modern agriculture. Ammonium sulfate powder provides 24% sulfur in the sulfate form, which plants can absorb directly through both roots and leaves. Sulfur is essential for protein synthesis, enzyme activation, chlorophyll formation, and oil production. The sulfate form is the most plant-available source of sulfur, ensuring rapid correction of deficiency symptoms.

Low Volatility for Environmental Stewardship

Compared to urea, ammonium sulfate has significantly lower ammonia volatilization potential, especially when incorporated into the soil or applied in solution. This reduced loss means more of the applied nitrogen reaches the crop, improving efficiency and reducing environmental impact.

Application Methods

Solution Preparation for Fertigation

For drip and sprinkler irrigation systems, prepare solution by adding ammonium sulfate powder to water with agitation. Use 50 to 100 kg per hectare per application dissolved in sufficient water for uniform distribution. The fully soluble product will not clog emitters or sprinklers when properly prepared. Apply through irrigation systems during crop growth for continuous nutrition.

Foliar Application

For foliar sprays, prepare a 1 to 2% solution by dissolving 1 to 2 kg of powder in 100 liters of water. Apply during early morning or late afternoon for maximum absorption. Avoid application during hot, sunny conditions to prevent leaf burn. Repeat applications at 10 to 14 day intervals for severe deficiencies. Add a non-ionic surfactant at 0.1% for improved leaf coverage and absorption.

Liquid Fertilizer Formulation

Ammonium sulfate powder is the preferred raw material for liquid nitrogen-sulfur fertilizer formulations. Dissolve in water with appropriate stabilizers and additives to create custom liquid blends. The high solubility allows for concentrated formulations that reduce transportation and handling costs.

Hydroponic and Soilless Systems

For hydroponic nutrient solutions, maintain 50 to 100 ppm nitrogen from ammonium sulfate, balancing with other nitrogen sources to achieve the desired nitrate to ammonium ratio. Monitor solution pH regularly as ammonium uptake can lower pH. The high purity of our powder ensures consistent performance in recirculating systems.

Soil Application

For soil application, broadcast 200 to 500 kg per hectare depending on crop requirements and soil test results. Incorporate into the soil within 24 hours of application to minimize nitrogen loss. The fine powder can also be applied through irrigation water or as a liquid drench for quick root zone penetration.

Seed Treatment and Starter Solutions

For seed treatment, prepare a 0.5 to 1.0% solution and soak seeds for 10 to 15 minutes before planting. For transplant solutions, dissolve 1 to 2 kg per 100 liters of water and apply to seedling roots before planting. This provides early nitrogen and sulfur during the critical establishment phase.

Crop-Specific Recommendations

Cereal Crops (Wheat, Barley, Oats)

Apply through irrigation or as foliar spray at tillering and boot stages. Expect rapid greening within 5 to 7 days. Yield increases of 10 to 20% in responsive conditions with improved protein content and test weight. Sulfur improves grain fill and milling quality.

Canola and Oilseeds

Apply through fertigation or foliar spray at rosette and early flowering stages. Canola has high sulfur requirements for oil synthesis. Expect 15 to 25% yield increase with improved oil content of 3 to 8%. Visible response includes darker green leaves and improved plant vigor.

Potatoes

Apply through irrigation or as foliar spray at tuber initiation and bulking stages. Sulfur improves tuber quality, specific gravity, and processing characteristics. Expect 15 to 25% yield increase with reduced internal defects such as hollow heart and internal brown spot.

Vegetable Crops

For leafy vegetables, apply through irrigation or foliar spray throughout the growing season. For root and bulb crops, apply at bulb initiation and development stages. Sulfur enhances flavor compounds, color, and storage quality. Expect improved marketable yield and extended shelf life.

Fruit Trees and Vine Crops

Apply through fertigation or foliar spray during bud break, flowering, and fruit development. Sulfur contributes to fruit quality, color development, and sugar content. Foliar applications provide rapid correction of deficiency symptoms.

Turf and Ornamentals

Apply through irrigation systems or as foliar spray for rapid greening and recovery. The fine powder formulation is ideal for liquid application equipment used on golf courses, sports fields, and commercial landscapes. Expect improved color, density, and stress tolerance.

Deficiency Correction Programs

Nitrogen Deficiency

Symptoms appear as uniform yellowing of older leaves, stunted growth, and reduced tillering. Apply 50 to 100 kg per hectare through irrigation or as foliar spray. Visible greening occurs within 5 to 7 days. Repeat applications as needed during active growth.

Sulfur Deficiency

Symptoms appear as yellowing of younger leaves, stunted growth, and reduced vigor. In canola, leaves may cup upward and develop purpling. Apply 50 to 100 kg per hectare through irrigation or as foliar spray. Rapid response occurs within 5 to 10 days with visible improvement in leaf color and plant growth.

Combined Deficiency

When both nitrogen and sulfur are deficient, plants show general chlorosis, stunted growth, and poor yield. Ammonium sulfate powder provides both nutrients in a single application for efficient correction. Apply 100 to 150 kg per hectare through irrigation or as split applications.

Technical Specifications

Chemical Composition

Total nitrogen: 21.0% minimum (ammonium form)
Sulfur: 24.0% minimum (sulfate form)
Free acidity: 0.05% maximum
Moisture: 0.5% maximum

Physical Properties

Particle size: 0.1 to 0.5 mm (fine powder)
Bulk density: 950 to 1050 kg per cubic meter
Solubility: 750 grams per liter at 20°C
Dissolution time: 15 to 30 seconds with agitation
pH of 1% solution: 5.0 to 6.0
Hygroscopicity: Moderate, store in dry, sealed containers

Quality Standards

Purity: 99.5% minimum
Heavy metals: Cadmium ≤1 ppm, Lead ≤5 ppm, Arsenic ≤1 ppm
Insoluble matter: ≤0.05%
Color: White to off-white powder

Solution Preparation Guidelines

General Procedure

Use clean water at ambient temperature. Add powder to water while stirring continuously. Continue agitation until completely dissolved, typically 1 to 2 minutes. For large volumes, use mechanical agitation or recirculation pumps. Prepare only the amount needed for immediate use to prevent settling or degradation.

Concentration Limits

Maximum practical concentration for solution preparation is 30 to 40% by weight. Higher concentrations may crystallize upon cooling. For fertigation, maintain solution concentration below 10% to prevent precipitation with other fertilizers. For foliar application, 1 to 2% solutions are recommended for crop safety.

Compatibility

Ammonium sulfate powder is compatible with most water-soluble fertilizers and pesticides. Conduct a jar test before large-scale mixing. Avoid mixing with highly alkaline materials such as lime, wood ash, or concentrated calcium solutions, as precipitation may occur.

Environmental and Safety Considerations

Soil Health

When used at recommended rates, ammonium sulfate does not contribute to long-term soil acidification beyond what is typical for ammonium-based fertilizers. Regular soil testing and pH monitoring are recommended to manage soil acidity. The sulfur component contributes to soil fertility in sulfur-deficient regions.

Water Quality

The ammonium form is held by soil colloids, reducing leaching potential compared to nitrate fertilizers. Proper timing and rate management minimize environmental impact. Avoid application on frozen, waterlogged, or saturated soils. When used in irrigation systems, follow best management practices to prevent runoff.

Worker Safety

Use appropriate personal protective equipment during handling including chemical-resistant gloves, safety glasses or goggles, and dust mask when mixing large quantities. Avoid inhaling dust during handling. Wash hands thoroughly after handling. In case of eye contact, flush with water for 15 minutes and seek medical attention if irritation persists.

Storage and Handling

Store in original sealed containers in a cool, dry, well-ventilated area. Protect from moisture to prevent caking and degradation. Keep away from strong oxidizing agents and incompatible materials. Shelf life is 24 months under proper storage conditions. Use FIFO (first in, first out) inventory management.

Spill Management

Contain spills immediately using inert absorbent materials such as sand or clay. Sweep or vacuum spilled material into approved containers. Avoid creating dust during cleanup. Dispose of collected material according to local regulations. Prevent entry into waterways or drains.

Quality Assurance

Our ammonium sulfate powder is manufactured under strict quality control procedures. ISO 9001:2015 certification ensures consistent product quality. ISO 14001:2015 certification demonstrates environmental responsibility. Batch-to-batch uniformity guarantees predictable performance. Complete traceability from production to delivery provides supply chain security. Third-party laboratory verification confirms product specifications.

Why Choose Ammonium Sulfate Powder

Maximum Solubility

The fine powder formulation provides the fastest dissolution rate available, making it ideal for solution preparation and applications requiring immediate nutrient availability. Complete dissolution within seconds ensures consistent solution strength and reliable performance.

Application Versatility

Ammonium sulfate powder is suitable for all liquid application methods including fertigation, foliar spray, hydroponic systems, seed treatment, and liquid fertilizer formulation. This versatility allows growers to use the same product for multiple purposes throughout the growing season.

Rapid Crop Response

The high solubility and immediate nutrient availability ensure quick correction of nitrogen and sulfur deficiencies. Visible greening often occurs within 5 to 7 days of application, providing confidence that the product is working and enabling timely adjustments to fertility programs.

Economic Value

The high nutrient concentration of 21% nitrogen and 24% sulfur provides excellent value per unit of active ingredient. The dual-nutrient formulation eliminates the need for separate sulfur applications, reducing fertilizer costs and simplifying fertility programs. The powder form reduces transportation weight compared to liquid formulations.

Precision Formulation

The uniform particle size and consistent solubility enable precise formulation of custom liquid blends. Formulators can achieve accurate nutrient concentrations with confidence, ensuring consistent product quality for their customers.

Ordering and Technical Support

Product Availability

Ammonium sulfate powder is available in 25 kg moisture-resistant bags, 50 kg bags, and 1-ton bulk bags. Custom packaging options are available for specific requirements. Bulk shipments are available in container loads for large-scale operations and formulators.

Technical Services

Soil test interpretation and application rate recommendations are provided. Solution preparation guidance and compatibility testing are offered. Fertigation and foliar application protocols are developed. Deficiency diagnosis assistance is available. Custom formulation support is provided for liquid fertilizer manufacturers.