This is the granule grade we load most often for Indonesian and Malaysian plantation buyers: a 0.5-1.5 mm sodium humate granule with 50-60% humic acid, packed for bulk handling and designed to be blended with NPK or applied straight to the palm circle. It is produced from weathered coal from Xinjiang and Ningxia, reacted with caustic soda, settled, and dried on the floor so the granules keep a glossy black surface and do not cake in a tropical warehouse.
Plantation estates usually come to us after they have tried powder and found it unmanageable. Powder bridges in the hopper, dusts off during application, and needs water to activate. Granules at 0.5-1.5 mm can be mixed with compound fertiliser at a 1:5 ratio without segregating, and they break down within one or two rainfall events, which fits the estate routine of applying at the palm circle before the rainy weeks.
We have supplied this grade to Sumatra and East Kalimantan estates since 2019 and keep a retained sample of every lot for twelve months. If your agronomy team wants to trial before committing, ask for a 25 kg sample bag, which we send against freight cost only.
Key Features
- Blendable granule size: 0.5-1.5 mm granules stay mixed with granular NPK through handling and do not float to the top of the bag.
- Fast wetting: breaks down in one or two rain events, releasing humate into the palm circle instead of sitting on the surface.
- Plantation-scale packing: 25 kg bags on 1 tonne pallets for estate stores, or 1 tonne jumbo bags for direct field discharge.
- Low dust content: screened and de-dusted, so estate workers are not exposed to black powder during bag opening.
- Cation exchange support: the humate fraction holds ammonium and potassium against leaching on sandy plantation soils.
- Consistent analysis: humic acid, moisture and pH tested on every lot, with the COA attached to the shipping documents.
Technical Specifications
| Parameter | Specification |
|---|
| Product name | Sodium Humate Granules, plantation grade |
| CAS number | 68131-04-4 |
| HS code | 38249999 |
| Total humic acid (dry basis) | 50-60% |
| Total organic matter (dry basis) | 70-80% |
| Water solubility | ≥85% |
| pH (1% solution) | 9-11 |
| Moisture | ≤15% |
| Granule size | 0.5-1.5 mm |
| Bulk density | 0.75-0.95 g/cm3 |
| Standard | HG/T 3278-2018 Type III |
Applications and Dosage Guidance
On oil palm, the usual estate practice is 300-500 g per palm per application at the weeded circle, twice a year, either broadcast by hand or mixed into the compound fertiliser programme. Keep the granules 50 cm away from the trunk base on young palms so the alkaline solution does not contact the growing point. On rubber and coconut, 200-400 g per tree per year split into two rounds is a reasonable starting rate, adjusted by soil organic matter from your leaf and soil analysis.
Where estates run fertigation, the same granules can be dissolved in a mixing tank at 20-50 kg per 1,000 litres and injected after the main nutrient schedule, but the tank must be agitated and the filter screens cleaned afterwards. For nursery use, incorporate 2-3 kg per cubic metre into the potting mix and leave it to equilibrate for a week before filling polybags.
Packaging, Documentation and Quality Assurance
Standard export packing is 25 kg PP woven bags with PE liner, 40 bags per pallet, 1 tonne per pallet, shrink wrapped and strapped. For estates that discharge directly into field stores we offer 1,000 kg jumbo bags with a four-loop top and discharge spout. Bag printing can carry your estate name, application rate table and lot number at no extra cost above 500 bags.
Our quality system follows HG/T 3278-2018 and ISO 9001:2015: incoming weathered coal is assayed for humic acid and ash, the reaction is controlled by density and pH, and finished granules are screened and tested for moisture and solubility before release. Each container ships with COA, MSDS and a phytosanitary declaration where the destination requires it. Third-party pre-shipment inspection through SGS, Intertek or BV is available on request.
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