INRATForage mixture calculator

National Agricultural Research Institute of Tunisia

Work out your seeding rate in seconds

From the thousand-grain weight, the germination rate and the target share of each species, instantly get the seeding rate for your forage mixture.

Calculate a mixtureThe seeding rate of each species, in seconds and without signing up.My calculationsFind your saved calculations, your plots and your conversations with INRAT.NewsThe latest INRAT news on forage crops.

How does it work?

  1. Build your mixture

    Choose your legumes, cereals and, if you wish, a taproot species, with the share of each.

  2. Pick the target density

    Take the benchmark for your zone (semi-arid, sub-humid, favourable) or your own value.

  3. Get the seeding rate

    For each species, in seeds per m², germination rate included. Save it or receive it by email.

Try the calculator

What is this calculator for?

This calculator works out the seed quantities of a forage mixture from the share of each species. Starting from the target share of plants per m² for each species in the mixture and its germination rate, it gives the seeding rate of each one needed to reach the overall target density.

Who is this tool for?

It is mainly intended for agricultural technicians and agronomists, to fine-tune advice on forage mixtures. It is also for farmers who simply want to work out their seeding rate, and for agronomy students.