Ragwort is a weed that grows on farmland. Ragwort is poisonous to horses. Plan an investigation to estimate the size of a population of ragwort growing in a rectangular field on a farm. – 7095

Q1.

Ragwort is a weed that grows on farmland.

Ragwort is poisonous to horses.

Plan an investigation to estimate the size of a population of ragwort

growing in a rectangular field on a farm.

(4)

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One thought on “Ragwort is a weed that grows on farmland. Ragwort is poisonous to horses. Plan an investigation to estimate the size of a population of ragwort growing in a rectangular field on a farm. – 7095

  1. Use a quadrat (like 1 m × 1 m in size).
    Place the quadrats randomly in the field, like by using random numbers or throwing it over my shoulder.
    Use at least 10 quadrats to get a reliable result.
    Count the number of plants in each quadrat.
    Work out the mean number of plants per quadrat.
    Find the area of the field (length × width).
    Multiply the mean per m² by the area of the field to estimate the total plant population.

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