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Plants per hectare and stand

Count the plants in 5 metres of row and see how many plants there are per hectare and what that represents of the target population.

Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.

Preliminary estimateRevision 12/11/2026
Field crop
Field count

Count at 3 to 5 points in the field, along a 5 m row, and use the average. The default values are only examples.

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—Plants per hectare
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Plants per hectare by count

Thousands of plants per hectare for counts of 50 to 100 plants over 5 m; the highlighted bar is yours.

Tap the chart to see the values.

Plants per hectare by spacing

Thousands of plants per hectare at each spacing, with your count; the dashed line is the desired population.

Tap the chart to see the values.

What if the data changes?

Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.

Tap the chart to see the values.

Stand by count over 5 m

Plants per hectare and stand for counts of 40 to 80 plants in 5 m, with the spacing and population you entered.

Step by step with your numbers

The calculation done in steps, with the values you entered.

    The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.

    How to use

    Count the plants in 5 metres of one row, at three to five points in the crop. Enter the row spacing in centimetres and the target population. The calculator shows plants per metre, per hectare and the plant stand.

    Worked example

    65 plants in 5 m of row, 50 cm spacing and a target population of 300 thousand plants/ha.

    Plants per meter = 65 ÷ 5 = 13. Plants per hectare = 13 × (10,000 ÷ 0.5) = 260,000 = 260 thousand/ha. Stand = 260 ÷ 300 = 86.7%.

    Precautions

    • One count is not enough: take at least three points and average them.
    • Diseased or stunted plants count in the total but do not yield the same. It is worth noting the stand quality as well.
    • For seed population, see the seed cost.

    Method, assumptions, and references

    Equations used

    Plants per meter = count in 5 m ÷ 5
    Plants per hectare = plants per meter × (10,000 ÷ spacing in meters)
    Stand (%) = Plants per hectare ÷ Desired population × 100

    Assumptions and limits

    • Uniform spacing between rows and a representative count of the area (at least 3 to 5 sampling points).
    • Does not consider planting failures or uneven seed distribution along the row.
    • For the target population, use the recommendation for your cultivar and region.

    Standards and technical documents

    • Embrapa Soja. Soybean production technologies (annual publication, current edition).

    Frequently asked questions

    Why count over 5 meters?

    Because it is an easy stretch to measure in the field and represents the population well. Count at least 3 to 5 points in the crop and take the average.

    Is stand the same thing as population?

    No. Population is the target (how many plants you wanted). Stand is how much of it was achieved in the field.

    What to do when the stand is low?

    Check the seed, germination, depth and planter setting, the soil and the weather right after emergence. Replanting is only worth it if done early.

    Why does spacing change the result?

    Because with the same plants per meter, narrower rows mean more plants per hectare. That is why spacing is part of the calculation.