Water-soluble / specialty fertilizers
Humic Acid Concentrate — 60% Soluble Humate for Fertigation & Soil Conditioning
FOB Black Sea / MENA · CFR/CIF worldwide on request
Indicative price
USD 410–500 / MT
Indicative range, firm quote on request
Key parameters
Quick contact
Full product details
Product overview
Humic acid concentrate is a high-analysis potassium humate derived from oxidised lignite or leonardite — organic matter compressed over millennia into a carbon-rich matrix that releases plant-available humic and fulvic fractions when solubilised. At 60% humic acid on a dry basis, one tonne of concentrate replaces several tonnes of raw leonardite in blending operations, reducing freight cost per unit of active carbon delivered to the field.
In agriculture, humic substances improve cation exchange capacity in sandy and degraded soils, chelate iron and zinc for root uptake, and stimulate microbial activity around the rhizosphere. Fertigation buyers inject dilute humate solutions through drip lines to buffer nutrient solution pH and reduce salt stress in saline irrigation water. Liquid-fertilizer compounders use the concentrate as a base for biostimulant formulations sold to greenhouse operators, orchard managers and broad-acre programmes rebuilding soil organic matter after years of intensive cropping.
Supply origins include leonardite extraction and potassium-humate spray-drying lines in Central Asia, China and Eastern Europe. The potassium salt form (K-humate) dissolves fully at field concentrations and contributes 10% K2O without chloride — compatible with chloride-sensitive crops when paired with SOP or potassium nitrate programmes.
Full specification
| Humic acid (dry basis) | 60% min |
| Fulvic acid | 8% min |
| Potassium (K2O) | 10% min |
| Water solubility (20°C) | 99% min |
| Water insoluble | 0.5% max |
| Moisture | 12% max |
| pH (1% solution) | 9.0–11.0 |
| Appearance | Black-brown flakes or fine powder |
| Particle size | 2–6 mm flakes or <100 mesh powder (on request) |
| HS code | 3824.90 |
- FOB
- CFR
- CIF
- Fertigation
- Biostimulant
- Soil amendment
- Blending
Loading ports & logistics
Humic acid concentrate ships as non-hazardous organic fertilizer input under IMDG general cargo rules. Moisture control during stuffing is important — powder grades cake when exposed to humid air; PE-lined bags and container desiccants are standard.
FOB from Black Sea container terminals and MENA bagging hubs. Standard parcel: 24 MT per 20-foot container (25 kg PE-lined PP woven bags, palletised) or 100–500 MT FIBC parcels on coaster vessels for regional distribution hubs. Powder and flake grades load at 150–250 bags/hour with forklift handling.
CFR/CIF to South Asia (Nhava Sheva, Mundra, Karachi), East Africa (Mombasa, Dar es Salaam), Middle East (Jeddah, Jebel Ali) and Mediterranean horticulture ports. Lead time 10–22 days from contract to loading window, subject to spray-dryer capacity and bagging-line availability at origin.
Packaging & documentation
Standard export pack: 25 kg PE-lined PP woven bags, palletised (40 bags per pallet) and stretch-wrapped for container loading. One-tonne FIBC big bags with moisture-barrier liner available for inland blending plants and liquid-fertilizer factories with pneumatic conveying. Powder grade (<100 mesh) ships in double-lined bags to minimise dust during discharge.
Each lot includes mill certificate of analysis (humic acid, fulvic acid, K2O, moisture, water solubility, pH), commercial invoice, packing list and bill of lading. Certificate of origin, phytosanitary clearance where required by destination customs, and third-party inspection at loading (SGS, Bureau Veritas) available for LC-backed contracts. SDS per GHS supplied on request.
FAQ
What is the difference between humic acid concentrate and fulvic acid products?
Humic acid concentrate contains both humic and fulvic fractions — humic acids improve cation exchange capacity and water retention in soil, while the fulvic fraction chelates micronutrients and accelerates root uptake. Standalone fulvic acid products carry a higher fulvic share but less soil-conditioning mass. This 60% humic concentrate suits buyers who need a single input for both soil amendment and fertigation tank enrichment.
At what dilution rate should humic acid concentrate be applied in drip fertigation?
Dilute to 0.05–0.2% in the irrigation stream (0.5–2.0 g/L of working solution) depending on crop and soil organic-matter level. In stock tanks, dissolve at 10–20% concentration and inject via a venturi at 1:50 to 1:100 dilution. Flush lines after each cycle when using hard water to prevent humate precipitation with calcium.
Can humic acid concentrate be blended with NPK water-soluble fertilizers?
Yes — humic acid is compatible with nitrate-based soluble NPK, calcium nitrate and potassium nitrate in separate or sequential injection. Avoid mixing concentrated humate with phosphate stock solutions in the same tank; humic acids can complex phosphorus and reduce immediate P availability. Use A/B tank systems or apply humate in alternate irrigation passes.
Related products
- Water-Soluble NPK — multi-ratio fertigation grades for paired humate programmes
- NPK + Micronutrients — granular base with Zn, B and trace elements for deficient soils
- Calcium Nitrate — soluble Ca+N compatible with sequential humate injection