Mycorrhizal Biofertilisers
A biofertiliser specified under the Fertiliser Control Order, 1985 (Schedule III, Part A, item 5). Key notified values: Total viable spores/gram of product Minimum 10 viable spore per gram of finished product.
Tip This is a compliance tool, so it is best viewed on a desktop or laptop. The phone version shows everything too.
Specification
As notified in the Order, line by line. Values are per cent by weight unless the line says otherwise.
How to read this table
- IP (infective propagules): live spores, fungal threads and colonised root pieces that can start mycorrhiza on a root, counted by the MPN (most probable number) plant test.
- Tolerance: a lab result may fall slightly short of the notified value before the sample is called non-standard; the limits are in Schedule III, Part B.
- S.O. … (E) is the number of the Gazette notification that made a change; “in force” (w.e.f., with effect from) is the date it started to apply.
| Parameter | Notified value | |
|---|---|---|
| Total viable spores/gram of product | Minimum 10 viable spore per gram of finished product. | |
| pH | 5.0-7.0 | |
| Inoculum potential | 1200 IP per gram of finished product by MPN method with 10 fold dilution. |
Tolerance (Schedule III, Part B): 3. In case of Mycorrhizal biofertilizers, total viable spores shall not be less than 8/gm of finished product.
Test methods: Schedule III, Part D (methods of analysis of biofertilisers).
Check a lab report
Compare the results of a lab test with this specification, line by line, including the tolerance allowed in Part B. Enter counts as on the report, for example 5x10^7, 5e7 or 50000000. A guide only: the report of a notified laboratory decides whether a sample is standard.
| Parameter | Notified | Lab result | Result |
|---|---|---|---|
| Viable spores per g | 10 per g minwith the tolerance: 8 min | ||
| pH | 5.0-7.0 | ||
| Infective propagules (IP) per g, MPN | 1200 per g min |
Notification history
- 1 Jul 2021S.O. 2671(E): entry substituted (in force 2 Jul 2021)
- 22 Sep 2022S.O. 4477(E): pH line substituted (was “6.0-7.5”)
Before you make, label or buy it
- Manufacturers and importers: each declared value on the label must meet the limit above; samples are tested by the notified method.
- Dealers and farmers: check that the product name and declared contents on the pack match this specification, and keep the bill with the batch number.
- Doses are not part of this specification: follow the label and local agricultural advice.
Questions? Ask our agri expert on WhatsApp.
Read more on NanoKheti
Show more biofertilisers 10 others
Consolidated by NanoKheti from the Fertiliser (Inorganic, Organic or Mixed) (Control) Order, 1985, as amended up to the Ninth Amendment Order, 2026 (S.O. 4045(E), 22 Jul 2026), for reference. The Gazette text is authoritative; this page is not legal advice. Check the notification before labelling, licensing or buying. Checked for later changes on 20 October 2026.