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Biofertiliser Dose Calculator

Work out biofertiliser dose instantly with clear inputs, formula shown and shareable results.

About Biofertiliser Dose Calculator

Carrier-based Rhizobium, Azotobacter and PSB inoculants are applied at 5-10 grams per kilogram of seed, made into a thin slurry with jaggery or gum solution so the culture sticks to the seed coat. Total requirement is seed weight x rate; packets are typically 200 g, treating around 20-40 kg of seed each.

Formulas

Inoculant quantity

Inoculant (g) = seed weight (kg) x rate (g/kg)

Packets

Packets = ceil(inoculant g / packet size g)

Worked example

With the default values below, Biofertiliser Dose Calculator returns Biofertiliser Required of 1,000.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Seed To Be Treatedminimum 0.1 kg
100 kg
Inoculant Rateminimum 0.1 g per kg seed
10 g per kg seed
Packet Sizeminimum 1 g
200 g
Slurry Water Per kg Seedminimum 1 mL
10 mL

Results

Biofertiliser Required
1,000.00
Packets To Buy
5
Slurry Water Needed
1,000.0
Dose Per Quintal Of Seed
1,000.0

Step by step

  1. 1Values used
  2. 2Inoculant quantity
  3. 3Packets
  4. 4Biofertiliser Required= 1,000.00
  5. 5Packets To Buy= 5
  6. 6Slurry Water Needed= 1,000.0
  7. 7Dose Per Quintal Of Seed= 1,000.0

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Can biofertiliser be mixed with fungicide-treated seed?

Treat with fungicide first, let it dry, then inoculate immediately before sowing — or better, use separate seed lots. Many fungicides kill the inoculant on contact.

How should inoculated seed be handled?

Dry it in the shade, never in direct sun, and sow the same day. Heat and sunlight kill the bacteria within hours and the treatment is wasted.

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