Agriculture, Soil, Fertilizer & Farm Operations worked example

Plant Population with plants counted in sample of 16 plants: a worked example

This worked example runs the plant population numbers for a tougher week than the baseline: plants counted in sample of 16 plants instead of the typical 32 plants. Estimate plant population per acre from plants counted, row length sampled, row spacing, and the acre conversion factor.

The inputs for this scenario

  • Plants counted in sample: 16 plants (the input this scenario stresses; the baseline uses 32)
  • Acre row-foot conversion: 17,424 row ft / acre (held at the documented default)
  • Sample row length conversion: 0.06 1 / row ft (held at the documented default)
  • Stand adjustment factor: 1 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Plant population = plants counted x acre row-foot conversion x sample length conversion x stand adjustment.
  • Estimated plant population works out to 15,919 plants / acre at these inputs, and this is the headline figure for the scenario.
  • Stand population before adjustment works out to 15,919 value at these inputs.
  • Stand adjustment factor works out to 1 x at these inputs.
  • Spatial row conversion works out to 278,784 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where plants counted in sample sits at 32 plants and the headline result is 31,837 plants / acre, this scenario comes in 50% below the baseline at 15,919 plants / acre.
  • Use it after emergence when doing stand counts to verify planter performance, decide on replant, or benchmark against your target seeding rate. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Estimated plant population: 15,919 plants / acre (headline result)
  • Stand population before adjustment: 15,919 value
  • Stand adjustment factor: 1 x
  • Spatial row conversion: 278,784 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Plant Population calculator, set plants counted in sample to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.