Phosphate Solubilising Fungal biofertilisers
A biofertiliser specified under the Fertiliser Control Order, 1985 (Schedule III, Part A, item 11). Key notified values: Spore Count Minimum 1×106 spores/gram Minimum 1×107 viable fungal spores/ml of the liquid.
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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
- 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 | |
|---|---|---|
| Spore Count | Minimum 1×106 spores/gram Minimum 1×107 viable fungal spores/ml of the liquid. | |
| Contamination level | Nil for liquid inoculums 1x103 cells per gram for carrier based preparation. | |
| pH | Liquid: 3.5 to 5.5 Carrier: 6.0 to 7.7 | |
| Efficiency character | The strain should be capable of solubilizing at least 30 mg/litre of Phosphorus in liquid broth when tested as per the method given using Tricalcium Phosphate or Aluminium Phosphate or Iron Phosphate as Phosphate source. |
Tolerance (Schedule III, Part B): 1. In case of Rhizobium, Azotobacter, Azospirillum Phosphate Solubilising Bacteria, Potash Mobilising Bacteria, Zinc Solubilising Bacteria, the total viable count shall not be less than 1×107CFU/gm of carrier material in the form of powder or granules or 5×107CFU/ml in case of liquid formulations.
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 | 1×106 per g min | ||
| Viable spores per mL | 1×107 per mL min | ||
| pH | 6.0-7.7 | ||
| pH | 3.5-5.5 |
Notification history
- 1 Jul 2021S.O. 2671(E): entry substituted (in force 2 Jul 2021)
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.
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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.