Humic acids 40% (Powder)
A humic and fulvic acid biostimulant in powder form, notified under FCO Schedule VI. Key notified measures: Humic acid ≥ 40 % w/w; Total organic carbon ≥ 20 % w/w. Notified for soybean and paddy (rice).
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Composition
As notified in the Gazette, ingredient by ingredient.
| Ingredient | Content | Limit | |
|---|---|---|---|
| i | Humic substances(Source: Leonardite) per cent. by weight, minimum | 75% w/w | Minimum |
| ii | Potash per cent. by weight, minimum | 4% w/w | Minimum |
| iii | Precipitated Silica (Anti- caking agent) per cent. by weight, minimum | 5% w/w | Minimum |
| iv | Moisture per cent. by weight, minimum | 16% w/w | Minimum |
| v | Total (per cent.) | 100 | Exact / specified |
Specifications (label claims)
The parameters a sample must meet, with the Part D method used to test each one.
| Parameter | Notified value | Test method | |
|---|---|---|---|
| i | Humic acid per cent. by weight, minimum | 40% w/w | Estimation of humic acid and fulvic acid |
| ii | pH (1% aqueous solution) | 8.5-11.5pH | Method 1: Estimation of pH |
| iii | Bulk density (g/cc) | 0.85-1.05Density | Method 3: Estimation of bulk density |
| iv | Total organic carbon per cent. by weight, minimum | 20% w/w | Method 4: Estimation of organic matter and organic carbon |
| v | Solubility per cent. by weight, minimum | 80% w/w | Method 5: Estimation of water solubility |
Tolerance (Schedule VI Part B, S.O. 3922(E)): Humic and Fulvic acid and their derivatives: 5% of the specified value of active ingredients or the tracer molecule.
Crops and doses
The Gazette wording is what counts; per-acre figures use 1 hectare = 2.47105 acres.
| Crop | Gazette dose | Per acre, each application | Per acre, season |
|---|---|---|---|
| Soybean | Two soil applications at 625 g/ha | 253 g | 506 g |
| Paddy (rice) | Two soil applications at 625 g/ha | 253 g | 506 g |
Notification history
- 13 Aug 2025S.O. 3741(E): entry inserted
Official notifications: Ministry of Agriculture & Farmers Welfare, biostimulant circulars.
Before you buy or stock it
- Check that the product name, composition and crop on the pack match this page.
- Use only the notified dose for your crop; the calculator converts it to your area.
- Ask the seller for the batch number and expiry date, and keep the bill.
Questions about your crop? Ask our agri expert on WhatsApp.
Show more humic & fulvic biostimulants 33 others in this category
Consolidated by NanoKheti from the Gazette of India notifications under Schedule VI of the Fertiliser (Inorganic, Organic or Mixed) (Control) Order, 1985, for reference. The Gazette text is authoritative; this page is not legal advice. Check the notification before labelling, licensing or buying. Covers notifications up to S.O. 1574(E) (25 Mar 2026); checked for later Schedule VI changes on 19 October 2026. Questions? Ask our agri expert on WhatsApp.