Examples
Examples
Try the starting example
- Target established plants per hectare
- 100000
- Row spacing (m)
- 0.5
- Germination (%)
- 80
- Emergence after germination (%)
- 100
- Seeds per hectare before whole-field rounding
- 125000
- Seeds per row metre
- 6.25
- In-row seed spacing (cm)
- 16
Try another scenario
- Target established plants per hectare
- 10000
- Row spacing (m)
- 1
- Germination (%)
- 100
- Emergence after germination (%)
- 100
- Seeds per hectare before whole-field rounding
- 10000
- Seeds per row metre
- 1
- In-row seed spacing (cm)
- 100
Calculation method
Calculation method
Seeds per hectare before whole-field rounding
Target plants per hectare / both survival fractions.
Seeds per row metre
Seeds per hectare × row spacing / 10,000.
In-row seed spacing (cm)
100 / seeds per row metre.
Symbols and units
- a
- Target established plants per hectare
- b
- Row spacing (m)
- c
- Germination (%)
- d
- Emergence after germination (%)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Uniform rectangular rows at your chosen crop target. Survival factors are user-supplied; geometry ignores headlands, skipped rows and individual plant variation. No agronomic spacing recommendation is inferred.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
University of Minnesota Extension: planting equipment calibration ↗
Background reading; this does not imply endorsement or independent review of SumFizz.