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

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.

   Reply