Humic acid and Fulvic acid 51% (Powder/Flake)
A humic and fulvic acid biostimulant in crystal form, notified under FCO Schedule VI. Key notified measures: Humic acid ≥ 50.0 % w/w; Fulvic acid ≥ 1.00 % w/w. Notified for paddy (rice).
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Composition
As notified in the Gazette, ingredient by ingredient.
| Ingredient | Content | Limit | |
|---|---|---|---|
| i | Humic substances (Source Browncoal/ Leonardite/ weathered coal), per cent. by weight, minimum | 80% w/w | Minimum |
| ii | Alkali reagents (Potassium hydroxide, sodium hydroxide, dipotassium hydrogen phosphate, potassium carbonate) per cent. by weight, minimum | 10% w/w | Minimum |
| iii | Water per cent. by weight, maximum | QS% w/w | Maximum |
| iv | 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 | 50.0% w/w | Estimation of humic acid and fulvic acid |
| ii | Fulvic acid per cent. by weight, minimum | 1.00% w/w | Estimation of humic acid and fulvic acid |
| iii | Total organic carbon per cent. by weight, minimum | 29.0% w/w | Method 4: Estimation of organic matter and organic carbon |
| iv | pH (50% aqueous solution) | 9.0- 12.0pH | Method 1: Estimation of pH |
| v | Bulk density (gram/cc) | 0.50- 0.90Density | Method 3: Estimation of bulk density |
| vi | Solubility per cent. by weight, minimum | 70% 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 |
|---|---|---|---|
| Paddy (rice) | Three applications (one soil and two foliar) at 1.875 kg/ha | 759 g | 2.28 kg |
Notification history
- 25 Mar 2026S.O. 1574(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.