JINGFENG · Organic Input
Insoluble Humic Acid Powder

Insoluble Humic acid is formed by microbial degradation of the dead biological substances. Its specific properties and structure depending on a given sample source from water or soil to extract the specific…

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Insoluble Humic Acid Powder

Product Overview

Insoluble Humic acid is formed by microbial degradation of the dead biological substances. Its specific properties and structure depending on a given sample source from water or soil to extract the specific conditions.Products we have are humic acid powder,granular humic acidand humic acid crystal.

Humus in soils and sediments can be divided into three main parts: humic acid (HA), fulvic acid (FA) and humin (HM). HA is soluble in alkali solution, but not soluble in water and acid, FA is soluble in alkali, soluble in water and acid; the HM is neither soluble in alkali, nor soluble in water and acids.

Technical Details

* 1Test Methods,GB/T 11957-2001 / ISO 19822 / HPTA / AAPFCO / IHSS Analysis method

AppearanceBlack Powder / Granule / Crystal
Product codeJFHA-HA-1-P/G/CJFHA-HA-2-P/G/C
Organic Matter (dry basis)85.0% min80.0% min
C.E.C≥250meq / 100g≥200meq / 100g
Free Humic Acid (dry basis)160.0% min50.0% min
Moisture25.0% max
Particle size2-4mm / 2-6mm
Fineness80-100 mesh
Granule Radial Load12N
pH4-6

Recommended Applications

Scenario

Agricultural Crops

Scenario

Vegetables

Scenario

Fruit Trees

Application Scope

*Other Scenarios: substrate cultivation, lawn & landscape greening, nursery production, and flower farming.

1. Soil Improvement (Primary)

Suitable for: Sandy/barren soil, heavy clay, saline-alkaline soil, continuous cropping obstacle soil.Method: Basal application (before plowing), mixed with organic/compound fertilizer for better effect.

2. Crop Base Fertilizer

Suitable for: Field crops, fruit trees, vegetables, medicinal herbs, etc.Methods: Field crops – 450-750kg/hectare powder + compound fertilizer (basal); Fruit trees/vegetables – 50-100g granules per planting hole + organic fertilizer; Perennial crops – 1,200-1,800kg/hectare granules (autumn post-harvest).

3. Targeted Scenarios

  • Seedling substrate: Add 5%-10% (volume) powder to improve germination rate and seedling vigor.
  • Saline-alkaline/degraded soil: 1,800-2,250kg/hectare granules + 750kg/hectare gypsum (saline-alkaline); 2,250-3,000kg/hectare (mine reclamation/wasteland).

II. Powder vs. Granules Selection

Trade script: “Powder is cost-effective for small-scale farming; granules suit large mechanized plantations and long-distance shipping (dust-free, easy to apply).”
  1. No foliar spray (insoluble, causes leaf burn/clogged sprayers; soil application only).
  2. Irrigate after application to avoid soil compaction.
  3. Not a fertilizer substitute; use with NPK/compound/organic fertilizers.
  4. Suitable for pH 5.5-8.5; adjust acidic soil (pH<5.5) with lime first.
  5. Seal and keep moisture-proof; avoid mixing with acids; crush clumped granules for reuse.
Soil TypePowder Dosage (kg/hectare)Granule Dosage (kg/hectare)Frequency
Sandy/Barren750-1,2001,200-1,8001-2 times/year (Spring/Autumn)
Heavy Clay/Saline-Alkaline1,200-1,8001,800-2,2502 times/year (Deep + Shallow plowing)
Ordinary Farmland/Orchard450-750750-1,2001 time/year (Base fertilizer)
FeaturePowderGranulesRecommended Clients
ConvenienceNeeds mixing; high uniform requirementDirect application; mechanized-friendlySmallholders (powder); large mechanized farms (granules)
Efficacy/ValidityFaster onset (1-2 weeks)Longer validity (3-6 months)Short-cycle crops (powder); long-cycle crops (granules)
Transport/StorageDusty; moisture-proof packaging neededDust-free; low lossDomestic short-distance (either); international trade (granules)
CostLower unit priceHigher cost but labor-savingCost-sensitive (powder); efficiency-focused (granules)

Packaging & Storage

Scenario

20kg 25kg bag

Scenario

Jumbo ton bag

We offer a range of standard packaging solutions: 20kg, 25kg bags,and 1ton jumbo bags.Custom packaging services are also available. Our team will provide tailored recommendations based on your specific requirements to ensure proper storage and transportation, maintaining product integrity throughout the process.

Insoluble Humic Acid Powder
Insoluble Humic Acid Powder

Certifications & Compliance

  • CERES (Confirmationfor Materials Used in Organic Agriculture)
  • REACH (Green chemical innovation, permitted in the EU)
  • ISO9001 / ISO14001 / ISO22000
  • Heavy Metal Test Report from ISO certified lab

Get latest documents here

Safety Data Sheet / Technical Data Sheet

  • MSDS (Insoluble humic acid material safety data sheet)
  • TDS (Insoluble humic acid material safety data sheet)

Get latest documents here

Successful Cases

Saline-Alkali Soil Remediation (Kezuohouqi, Inner Mongolia, China)Case

Saline-Alkali Soil Remediation (Kezuohouqi, Inner Mongolia, China)

Water-insoluble granular humic acid amendment | Application: 60 hectares, 150-250 kg/hectare (broadcast & rotary till mixed) | Results: Rice yield increased 108.7%-118% (3,027→6,317-6,599 kg/ha); soil pH dropped from 9.5+ to 7.5-8.0; 30% lower remediation cost.

Soda Saline-Alkali Soil Transformation (Heilongjiang/Jilin, China)Case

Soda Saline-Alkali Soil Transformation (Heilongjiang/Jilin, China)

Lignite-based water-insoluble humic acid conditioner | Application: 1,800-2,250 kg/hectare | Results: Zhaoyuan (Heilongjiang): rice yield 323% increase (915→2,959 kg/ha); Da'an (Jilin): 3,922% increase (59→2,314 kg/ha); long-term effect (3-5 years).

Grape Orchard Soil Enhancement (Zhejiang, China)Case

Grape Orchard Soil Enhancement (Zhejiang, China)

Water-insoluble humic acid powder (60% content) | Application: 450 kg/hectare (autumn post-harvest, mixed with organic fertilizer 1:3) | Results: Soil pH 5.78→6.55; water-holding capacity +20%; grape yield +18% (18,600→22,000 kg/ha); sugar content 16%→19%.

Ginger & Garlic Yield Improvement (Shandong, China)Case

Ginger & Garlic Yield Improvement (Shandong, China)

Water-insoluble humic acid granules (65% content + microbial inoculant) | Application: Ginger 1,500 kg/ha (base fertilizer); Garlic 1,200 kg/ha (pre-planting) | Results: Ginger yield +40% (45,000→63,000 kg/ha); garlic yield +25% (30,000→37,500 kg/ha); root rot/blight reduced 40%-60%.

Tobacco Quality & Profit Enhancement (Yunnan, China)Case

Tobacco Quality & Profit Enhancement (Yunnan, China)

Water-insoluble humic acid powder + NPK blend | Application: 750 kg/ha humic acid + 300 kg/ha NPK (base fertilizer) | Results: Tobacco yield +20.8% (1,880→2,250 kg/ha); profit +43.6% ($4,268→$6,127/ha); high-grade leaves 52%→67%.

Heavy Metal-Contaminated Soil Remediation (China)Case

Heavy Metal-Contaminated Soil Remediation (China)

Modified water-insoluble humic acid powder | Application: 2,250-3,000 kg/ha (incorporated 20cm deep) | Results: Wheat grain cadmium content -81.77% (0.35→0.064 mg/kg, meets food safety); soil available cadmium -65%; yield +10-15%. 2. Core Implementation Tips Soil application only; no foliar spray (insoluble in water). Irrigate thoroughly after application (moisten 20cm soil depth) to activate binding. Mix with organic fertilizer (1:3) for best effect; replace 20-30% chemical fertilizer. Optimal timing: early spring/autumn; apply as base fertilizer for annual crops.

Case 1: Saline-Alkali Soil Remediation (Kezuohouqi, Inner Mongolia, China)
Product: Water-insoluble granular humic acid amendment | Application: 60 hectares, 150-250 kg/hectare (broadcast & rotary till mixed) | Results: Rice yield increased 108.7%-118% (3,027→6,317-6,599 kg/ha); soil pH dropped from 9.5+ to 7.5-8.0; 30% lower remediation cost.
Case 2: Soda Saline-Alkali Soil Transformation (Heilongjiang/Jilin, China)
Product: Lignite-based water-insoluble humic acid conditioner | Application: 1,800-2,250 kg/hectare | Results: Zhaoyuan (Heilongjiang): rice yield 323% increase (915→2,959 kg/ha); Da’an (Jilin): 3,922% increase (59→2,314 kg/ha); long-term effect (3-5 years).
Case 3: Grape Orchard Soil Enhancement (Zhejiang, China)
Product: Water-insoluble humic acid powder (60% content) | Application: 450 kg/hectare (autumn post-harvest, mixed with organic fertilizer 1:3) | Results: Soil pH 5.78→6.55; water-holding capacity +20%; grape yield +18% (18,600→22,000 kg/ha); sugar content 16%→19%.
Case 4: Ginger & Garlic Yield Improvement (Shandong, China)
Product: Water-insoluble humic acid granules (65% content + microbial inoculant) | Application: Ginger 1,500 kg/ha (base fertilizer); Garlic 1,200 kg/ha (pre-planting) | Results: Ginger yield +40% (45,000→63,000 kg/ha); garlic yield +25% (30,000→37,500 kg/ha); root rot/blight reduced 40%-60%.
Case 5: Tobacco Quality & Profit Enhancement (Yunnan, China)
Product: Water-insoluble humic acid powder + NPK blend | Application: 750 kg/ha humic acid + 300 kg/ha NPK (base fertilizer) | Results: Tobacco yield +20.8% (1,880→2,250 kg/ha); profit +43.6% ($4,268→$6,127/ha); high-grade leaves 52%→67%.
Case 6: Heavy Metal-Contaminated Soil Remediation (China)
Product: Modified water-insoluble humic acid powder | Application: 2,250-3,000 kg/ha (incorporated 20cm deep) | Results: Wheat grain cadmium content -81.77% (0.35→0.064 mg/kg, meets food safety); soil available cadmium -65%; yield +10-15%.

2. Core Implementation Tips

  • Soil application only; no foliar spray (insoluble in water).
  • Irrigate thoroughly after application (moisten 20cm soil depth) to activate binding.
  • Mix with organic fertilizer (1:3) for best effect; replace 20-30% chemical fertilizer.
  • Optimal timing: early spring/autumn; apply as base fertilizer for annual crops.

FAQ

1. What are the core functions of insoluble humic acid?

Core functions include improving soil structure, enhancing water and fertilizer retention, slow nutrient release, regulating soil pH, and remediating saline-alkali or heavy metal-contaminated soils. It is mainly used as a soil amendment and base fertilizer.

2. Can insoluble humic acid be used for foliar spraying?

No. Insoluble humic acid cannot dissolve in water; foliar spraying will cause leaf burn and clog sprayers. It is only suitable for soil application.

3. How to choose between insoluble humic acid powder and granules?

  • Powder: Cost-effective, suitable for smallholder farmers (manual planting) and short-cycle crops (e.g., vegetables, wheat) due to faster onset (1-2 weeks).
  • Granules: Dust-free, easy for mechanized operation, suitable for large-scale farms, long-cycle crops (e.g., fruit trees, medicinal herbs) and long-distance transportation (longer validity: 3-6 months).

4. Which soil types are suitable for insoluble humic acid?

It is highly effective for sandy/barren soil, heavy clay soil, saline-alkali soil (including soda saline-alkali soil), continuous cropping obstacle soil, and heavy metal-contaminated soil.

5. How to store insoluble humic acid and what is its shelf life?

  • Storage conditions: Keep in a dry, well-ventilated warehouse; avoid moisture, direct sunlight, and contact with strong acids/alkalis. Seal the package tightly after opening to prevent caking.
  • Shelf life: 2-3 years for unopened packages (stored as required); use opened products within 6 months for best effectiveness.
  • Note: Mild caking does not affect product performance—crush it before use.

6. Is irrigation necessary after application?

Yes. Irrigate thoroughly after application (moisten soil to 20cm depth) to activate the binding between humic acid and soil particles, avoiding soil compaction.

7. Can insoluble humic acid replace chemical fertilizers?

No. It cannot replace chemical fertilizers or organic fertilizers. It should be used with NPK compound fertilizers or organic fertilizers (mix with organic fertilizers at 1:3 for best effect) to improve fertilizer use efficiency and can replace 20-30% of chemical fertilizers.

8. How long does it take to see results after application?

  • Powder: Faster onset, visible effects (e.g., improved seedling vigor, soil looseness) in 1-2 weeks;
  • Granules: Slow release, long-term validity (3-6 months), obvious yield increase effects in 1-2 growing seasons.

9. Does it work for heavy metal-contaminated soil?

Yes. Modified insoluble humic acid can effectively immobilize heavy metals (e.g., cadmium). For cadmium-contaminated farmland, it can reduce wheat grain cadmium content by 81.77% and soil available cadmium by 65%, meeting food safety standards.

10. When is the best time to apply insoluble humic acid?

The optimal time is early spring or autumn. For annual crops, apply as base fertilizer before planting; for perennial crops (e.g., fruit trees), apply after autumn harvest (around the drip line of the crown).

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