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NPK21-21-21s

  • NPK21-21-21s

NPK21-21-21s
NPK21-21-21+S is a premium-grade, fully water-soluble fertilizer with a perfectly balanced 1:1:1 ratio of Nitrogen (21%), Phosphorus (21%), and Potassium (21%), enriched with Sulfur (S). This high-purity formula is designed for maximum efficiency in fertigation and foliar feeding systems. The balanced nutrient profile supports all stages of plant growth, from vegetative development to flowering and fruiting. The addition of sulfur is crucial for protein synthesis and chlorophyll production. Ideal for high-value crops in greenhouses and open fields, NPK21-21-21+S ensures rapid nutrient uptake, promoting vigorous growth, high yields, and superior crop quality.
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Product Details

2.1 Key Features
Perfectly Balanced Ratio: The equal 21-21-21 NPK ratio provides a complete and harmonious nutrient supply, preventing any single element from limiting growth.
High Water Solubility: Dissolves completely and rapidly in water, leaving no residue, making it ideal for drip irrigation, sprinkler systems, and foliar sprays.
Sulfur Enrichment: Contains essential sulfur, which is a key component of amino acids and vitamins, enhancing the effectiveness of nitrogen and improving overall plant metabolism.
Chloride-Free & Low Salt Index: Safe for sensitive crops and minimizes the risk of root burn or soil salinity buildup.

Versatile Application: Suitable for a wide range of crops and can be used throughout the entire growth cycle.

2.2 Primary Functions and Benefits

FunctionBenefit to PlantsAgronomic Advantage
Complete NutritionProvides all three primary macronutrients in equal, high concentrations.Supports balanced growth, eliminating the guesswork in nutrient management during rapid growth phases.
Rapid CorrectionNutrients are immediately available for plant uptake.Quickly corrects nutrient deficiencies, leading to fast recovery and visible improvements in plant health.
Sulfur SynergySulfur improves nitrogen utilization and is vital for chlorophyll formation.Enhances photosynthetic efficiency, leading to darker green leaves and improved plant vigor.
Stress MitigationThe balanced potassium content improves plant resilience.Increases tolerance to environmental stresses such as drought, disease, and temperature fluctuations.

2.3 Target Crops and Application Scenarios
Greenhouse Crops: Tomatoes, cucumbers, peppers, lettuce, herbs - Used as the main fertilizer in hydroponic systems or substrate cultivation, applied with every irrigation.
High-Value Field Crops: Strawberries, melons, potatoes, tobacco - Ideal for fertigation during critical growth stages to maximize yield and quality.
Fruit Trees & Vineyards: Citrus, grapes, apples - Applied through drip systems during fruit set and development to ensure uniform fruit size and quality.
Ornamentals & Nurseries: Promotes lush, green foliage and strong root systems in flowers and ornamental plants.
2.4 Application Guidelines (General)
Fertigation (Recommended):
Dilution: Dissolve 5-10 kg of NPK21-21-21+S in 1000 liters of water.
Application Rate: Apply 5-15 kg per hectare per application. Frequency can range from weekly to daily, depending on the crop's growth stage and the irrigation schedule.
Foliar Spray:
Dilution: Dissolve 2-3 kg in 1000 liters of water.
Spray: Apply evenly to leaves until runoff. Best done in the early morning or late afternoon to maximize absorption.
Compatibility: Can be mixed with most other water-soluble fertilizers and agrochemicals, but a jar test is recommended before large-scale mixing.
Nutrient Role Summary
FeatureNPK21-21-21+SNPK20-20-20NPK15-15-15
Nutrient ConcentrationHigher (21% each)High (20% each)Standard (15% each)
Sulfur ContentIncludedUsually not includedUsually not included
Primary UseHigh-efficiency fertigation, quick correctionGeneral-purpose soluble fertilizerGeneral-purpose, cost-effective soluble fertilizer
Key AdvantageMaximum nutrient density per kg, plus sulfur benefitsWidely available, standard for many cropsLower cost, suitable for less intensive applications

Note: NPK21-21-21+S is a high-performance fertilizer designed for precision agriculture. Its high solubility and balanced formula make it an excellent choice for farmers and growers who require precise control over their crop nutrition to achieve optimal results. The inclusion of sulfur adds significant value, making it a comprehensive solution for modern, high-yield farming systems.

Product Application

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Company Profile

Shandong Nongsheng Fertilizer Co., Ltd. adheres to the "co-prosperity" concept of "win-win development with customers", continuously develops products that meet customer needs, improves process quality, establishes a cooperative mechanism with chemical research institutions and universities, links customer needs, provides product customization services, provides customers with a variety of choices, and reduces supply risks and procurement costs.

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Our products are of high quality and low price, and our cooperative customers recognize our products. And as long as the cooperative customers have maintained long-term cooperative relations.

Certificate Of Honor

For a long time, we have been focusing on the research, development and management of crop fertilizers and their surrounding industrial chains. Our customers are all over the country, and in Southeast Asia, Europe, the Middle East, Africa and other regions. With stable quality and high-quality services, our company has become a strong supplier and exporter of fertilizer and related products in China.

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FAQ

Q: Are you a factory or a trading company?

A: We are a company integrating manufacturing and trading.

Q: Can you provide samples for testing before mass production?

A: Of course, we can send you samples for free, and we also attach COA, but for the sample shipping fee, our company can't afford it!

Q: How can I get an accurate quotation?

A: Please tell us the accurate product specifications, particle size, color, and your use, and we will provide you with an accurate quotation.

Q: Can you provide COA?

A: Of course, we can provide it, but only ordinary products, if you want an accurate COA, we need to produce samples. After testing, provide an accurate COA.

Q: Can you accept OEM (special specifications, sizes)?

A: Of course, we can customize according to different requirements of customers, not only that, we can also design packaging according to your requirements.

Q: If I know the use, but don't know the exact specifications, can you provide an exact quotation?

A: Of course, we will recommend products according to your usage, please trust us.

Q: Can I visit your factory before placing a large order?

A: Of course. Welcome at any time.
Q: Can you customize the packaging?

A: Of course, we can customize the packaging according to the pictures provided by customers.
Q:What is the payment terms of your company?
A: T/T,L/C at sight,Western Union,Paypal.

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