Humic acid 51 % (Granular)
A humic and fulvic acid biostimulant in granule form, notified under FCO Schedule VI. Key notified measures: Humic acid ≥ 51 % w/w; Fulvic acid ≥ 10 % w/w. Notified for green gram.
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Composition
As notified in the Gazette, ingredient by ingredient.
| Ingredient | Content | Limit | |
|---|---|---|---|
| i | Humic acid (Source: American Leonardite) per cent. by weight, minimum | 51.00% w/w | Minimum |
| ii | Fulvic acid per cent. by weight, minimum | 10.00% w/w | Minimum |
| iii | Potassium as K2O per cent. by weight, minimum | 16.00% w/w | Minimum |
| iv | Tetrapotassium pyrophosphate per cent. by weight, minimum | 4.50% w/w | Minimum |
| v | Lignosulphonic acid per cent. by weight, minimum | 14.22% w/w | Minimum |
| vi | Alcoxylated fatty acid ester on vegetable base per cent. by weight, minimum | 0.36% w/w | Minimum |
| vii | Water per cent. by weight, maximum | 3.92% w/w | Maximum |
| viii | 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 | 51% w/w | Estimation of humic acid and fulvic acid |
| ii | Fulvic acid per cent. by weight, minimum | 10% w/w | Estimation of humic acid and fulvic acid |
| iii | Bulk density (gram/cc) | 0.5 - 0.7Density | Method 3: Estimation of bulk density |
| iv | pH (1% aqueous solution) | 10 - 12pH | Method 1: Estimation of pH |
| v | Total organic carbon per cent. by weight, minimum | 25.45% w/w | Method 4: Estimation of organic matter and organic carbon |
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 |
|---|---|---|---|
| Green gram | Two soil applications at 1.5 kg/ha | 607 g | 1.21 kg |
Notification history
- 12 Sep 2024S.O. 3922(E): initial Schedule VI entry · superseded by a later entry
- 16 Feb 2026S.O. 876(E): entry substituted (full replacement)
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.
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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.