Sugar estates in Negros and Luzon buy this grade for a specific reason: it holds 50% humic acid and 70% total organic matter in a granule that releases over a full crop cycle rather than a single irrigation. Cane is a twelve-month crop, and a humate that flashes into solution in the first week is largely wasted by the time the cane reaches grand growth.
The granule is built for that timeline. We screen the material to 1.5-2.5 mm and dry it slowly on the floor, which leaves a denser crystal that breaks down across two to three wetting cycles. In a cane field the granules are usually placed in the furrow at planting, at 300-500 kg per hectare, so the humate sits where the sett roots will form instead of being broadcast over soil that will not be cultivated again for a year.
Volcanic soils in the Visayas are often high in total phosphorus but low in available phosphorus, and cane responds to the chelating action of the humate fraction on phosphorus and micronutrients. Our agronomy note for cane covers placement depth, blending with compound fertiliser and the timing of the first ratoon application, and we send it with every trial order.
Key Features
- Slow release granule: denser 1.5-2.5 mm crystal breaks down over two to three wetting cycles, matching a twelve-month cane crop.
- 50% humic acid, 70% organic matter: a lower ash material that still delivers a heavy organic load per tonne applied.
- Furrow placement: granule flows through planter boxes and stays where it is dropped, without the drift loss of powder.
- Phosphorus chelation: humic and fulvic fractions keep applied phosphate and trace elements available in volcanic soils.
- Reduced fertiliser burn: placing humate with the sett buffers the salt effect of compound fertiliser close to young roots.
- Cost per hectare discipline: 300-500 kg per hectare at planting is a practical rate for estate budgets, not a laboratory dose.
Technical Specifications
| Parameter | Specification |
|---|
| Product name | Organic Sodium Humate Granules, slow release grade |
| CAS number | 68131-04-4 |
| HS code | 38249999 |
| Total humic acid (dry basis) | ≥50% |
| Total organic matter (dry basis) | ≥70% |
| Water solubility | ≥85% |
| pH (1% solution) | 9-11 |
| Moisture | ≤15% |
| Granule size | 1.5-2.5 mm |
| Release pattern | Two to three wetting cycles |
| Standard | HG/T 3278-2018 Type III |
Applications and Dosage Guidance
At planting, place 300-500 kg per hectare in the furrow and cover with 5-8 cm of soil before dropping the setts; direct contact between sett and undissolved granule is best avoided. For ratoon crops, apply 400-600 kg per hectare along the stool line immediately after harvest and irrigate or wait for the first rain, then close the rows. On sandy soils, split the rate into two applications four weeks apart to reduce leaching loss.
The same grade suits maize, cassava and vegetables where a longer release is wanted. On maize, 200-300 kg per hectare banded at planting; on cassava, 250-400 kg per hectare in the planting hole; on transplanted vegetables, 40-60 g per plant worked into the bed before transplanting. Where soil pH is already above 7.5, reduce the rate by a third and monitor the sodium index in your soil test each season.
Packaging, Documentation and Quality Assurance
Export packing is 25 kg PP woven bags with PE liner, 40 bags per 1 tonne pallet, or 1,000 kg jumbo bags for estates that blend on site. Bags print your estate or importer brand, application rate table and lot number from 500 bags per size. A 20GP holds 25 tonnes palletised.
Each lot ships with a COA covering humic acid, organic matter, solubility, moisture and pH, plus an English MSDS and packing list. We keep a retained sample for twelve months, so a claim can be checked against the actual production lot rather than against a generic specification sheet. Third-party inspection and factory audits are welcome under our ISO 9001:2015 system.
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