In Buriram and Sisaket, the third and fourth ratoon is where the yield curve falls off. The stool is still alive but the root plate is exhausted, soil organic matter has dropped below 1%, and the mill gate weight tells the story at the end of the season. The usual response is more urea and more vinasse, which greens the cane but does not rebuild the soil. This granule carries 60% humic acid with 12% K2O, so the ratoon gets organic carbon and the potassium it removes in the stalk in the same pass.
A cane crop removes roughly 200-250 kg of K2O per hectare in the millable stalk, and most of that sits in the trash that is either burnt or removed. Ratoon decline in sandy Isaan soils is partly a potassium problem and partly a structure problem, and the two are linked: without exchange capacity, applied potassium leaches past the root plate during the first heavy rain. The humic fraction holds the K on the exchange complex near the stool, and the granule's 3-5mm size lets it be applied with the same fertiliser spreader the plantation already uses after harvest.
We advise applying 250-400 kg per hectare in the furrow or over the stool line immediately after the ratoon harvest, then irrigating or waiting for the first rain. On the better-managed plantations that use a full trash blanket, 250 kg is enough; on burnt-cane blocks with low organic matter, go to the top of the range and split it across two passes.
Key Features
- 60% humic acid plus 12% K2O: Rebuilds organic carbon and supplies the potassium removed with the stalk in one granule, one pass
- 3-5mm granule, 10N strength: Runs through standard plantation spreaders and drops into the furrow without turning to dust
- Holds potassium near the stool: Exchange capacity reduces the leaching loss that follows the first heavy rain on sandy Isaan soils
- Fit for trash-blanket systems: Works under a green cane trash blanket where surface-applied urea is less effective
- Ratoon-focused dosing: Rates matched to ratoon number so the block with the fourth ratoon gets the heavier application
- Full lot traceability: Batch code on the bag, retained sample 24 months, COA with each shipment
Technical Specifications
| Parameter | Specification |
|---|
| Appearance | Black spherical granule |
| Granule Size | 3-5mm |
| Humic Acid (dry basis) | 60% min |
| Potassium (K2O) | 12% min |
| Crushing Strength | 10N min |
| Moisture | 15% max |
| pH (1% suspension) | 8.0-9.5 |
| Application Rate | 250-400 kg/ha after each ratoon harvest |
Applications
Apply 250-400 kg per hectare after each ratoon harvest, banded in the stool line or broadcast and incorporated with the first irrigation. On plant cane, use 300-400 kg per hectare as a basal application. In sandy Isaan soils with organic matter below 1%, splitting the dose into two passes three weeks apart gives better response than a single heavy application.
Do not leave the bags stacked in the field for more than a week before spreading; the granule absorbs moisture from the ground and the spreader will bridge. If you blend with urea, blend at the point of spreading only.
Packaging, Documentation & Quality Assurance
Packed in 25kg PP woven bags with PE liner, 40 bags per pallet, and 1 ton jumbo bags for plantation-scale application. Neutral printing or your own label with Thai and English panels; we can print your recommended rate table on the back for dealer resale.
Every batch is assayed for humic acid, K2O, granule size, crushing strength and moisture. A sealed 500g retained sample is kept for 24 months and referenced to the batch code printed on each bag. Third-party inspection at Qingdao by SGS or BV is available before loading at cost.
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