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Ammonium Sulfate 21-24

Ammonium Sulfate 21-24

Ammonium Sulfate 21-24 is a high-quality inorganic nitrogen-sulfur compound fertilizer, the classic agrochemical with fixed nutrient content of 21% total nitrogen (N) and 24% available sulfur (S), presented as white crystalline powder or granular solid. It features high water solubility, rapid nutrient release and easy crop absorption, suitable for all soil types especially sulfur-deficient acidic soils. Widely applied in grain, cash, fruit and vegetable crops, it supplies dual N-S nutrition, promotes crop growth and improves yield, a staple fertilizer for agricultural production with mature production process and stable quality.
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Product Details

Basic Product Specifications
IndexStandard Specification
Nutrient ContentTotal N ≥21%, Available S ≥24%
AppearanceWhite crystals/granules, odorless, no visible impurities
Purity≥99% (industrial/agricultural grade)
Water SolubilityHighly soluble in water (fully dissolved at 20℃)
pH Value5.0-6.0 (1% aqueous solution, weakly acidic)
FormCrystalline (fine/coarse/extra-large) / Dried granules
Particle SizeCustomizable (≤1.1mm fine crystals / ≥1.2mm coarse crystals / 2-4mm extra-large crystals)


Core Functions & Nutritional Value

  1. Dual N-S Nutrition Supply: 21% quick-acting ammonium nitrogen is easily absorbed by crop roots, meeting the core nitrogen demand for vegetative growth; 24% available sulfur supplements essential sulfur for amino acid, protein and chlorophyll synthesis, avoiding sulfur deficiency-induced yellowing leaves.
  2. Soil Adaptability: Weakly acidic property optimizes acidic soil structure, activates soil nutrient availability (e.g., phosphorus, potassium), and is the ideal fertilizer for sulfur-deficient farmland, solving the problem of simultaneous N-S deficiency in crops.
  3. Crop Growth Promotion: Enhances photosynthesis, accelerates nutrient accumulation, promotes tillering and fruiting, and increases crop thousand-grain weight and fruit setting rate.
  4. Quality Improvement: Improves crop protein and oil content (especially for oilseeds like rapeseed, peanut), and enhances the commercial quality of fruits and vegetables with bright color and plump fruit.

Main Applications

Suitable Crops

  • Grain Crops: Wheat, rice, corn, barley (promote tillering and grain plumpness)
  • Oilseeds & Cash Crops: Rapeseed, peanut, cotton, tobacco, tea (improve oil/protein content and product quality)
  • Fruits & Vegetables: Apple, citrus, tomato, cucumber, strawberry (supplement sulfur for bright color and high yield)
  • Forage & Economic Crops: Alfalfa, sugarcane, beet (promote rapid growth and high biomass)


Application Methods & Dosage

  1. Base Fertilizer: 20-30kg per mu, mixed evenly with soil before sowing/transplanting, provides basic N-S nutrition for the whole growth cycle.
  2. Top Dressing: 10-15kg per mu at crop tillering, jointing and flowering stages; applied by spreading or ditching, covered with soil after application to reduce nitrogen volatilization.
  3. Foliar Spraying: Dilute into 0.5-1.0% aqueous solution, spray on leaves in the morning/evening, emergency supplementation for N-S deficiency (yellowing leaves).
  4. Mix Application: Can be mixed with phosphate fertilizer, potassium fertilizer (excluding alkaline fertilizers such as lime, plant ash) to realize balanced fertilization.

Product Advantages

  1. Fixed High Nutrient: 21-24 standard N-S ratio, no component fluctuation, stable fertilization effect, meeting the industrial standard of agricultural ammonium sulfate.
  2. Fast & Efficient Absorption: High water solubility, quick-acting nutrient release, rapid effect after application, suitable for timely top dressing of crops in growth period.
  3. Wide Soil Adaptability: Adapt to acidic, neutral, calcareous soils, especially suitable for sulfur-deficient farmland; weakly acidic property can improve soil acidity and activate soil nutrients.
  4. Diverse Forms & Customization: Available in fine/coarse/extra-large crystals and dried granules with customizable particle size, adapting to different application methods (mechanical spreading, manual sowing).
  5. Mature Production & Stable Quality: Adopt advanced industrial synthesis process, low moisture content, no caking, easy storage and transportation, consistent product quality.
  6. Cost-Effective: High nutrient content, low production cost, obvious yield-increasing effect, high cost performance for large-area agricultural application.


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FAQ

Q1: What international standards do your products and services comply with?

A1: Our products fully comply with international standards such as REACH, MSDS, and COA, and we strictly implement the ISO9001 quality management system. We can also provide third-party testing reports (SGS, BV, etc.) according to customer needs.


Q2: How long does it take for goods to be delivered to my country?
A2: The delivery time depends on the transport mode and destination country. Generally, sea transport takes 15-30 days, air transport takes 3-7 days, and we will optimize the transport route to shorten the delivery time as much as possible.


Can you provide customs clearance services for dangerous chemicals?
A3: Yes. Our team is proficient in the customs clearance procedures for dangerous chemicals in various countries, and can provide professional compliant declaration and customs clearance services to ensure smooth customs clearance.


Q4: Do you provide customized product and service solutions?
A4: Yes. We can provide personalized product customization and export service solutions according to your specific needs (product specifications, application scenarios, procurement volume, etc.).

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