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# Study the Plant Population Frequency by Quadrat Method

## Aim

To study the plant population frequency by the quadrant method.

## Materials Required

• Cotton/Nylon thread
• 4 nails
• Hammer

## Procedure

1. Select the site of study and make a quadrant of 1m*1m using the nails and the thread.
2. Fix the nails with the help of a hammer without destroying the vegetation.
3. Make nine similar quadrants at the site of study.
4. The plant species for the study should be selected.
5. Observe the species in the first quadrant and mark them as species A.
6. Check the presence of species A in all the quadrants and record the observations in the table.
7. Similarly, record the number of species B and C in all the quadrants and mention them in the table.
8. Determine the frequency of plant population by the formula:

Percentage frequency= (No. of sampling units in which species occur)/(Total number of sampling units used in the study)*100

## Observations

 Plant Species Quadrants employed in the study No. of quadrants in which species are present (N) Percentage Frequency(F)=N/Q*100 I II III IV V VI VII VIII IX X A P P P 3 30% B P P P P 4 40% C P P P P P 5 50%

## Conclusion

The plant population frequency is the highest in species C and the least in species A. It shows how many times a plant species is present in the provided number of sample quadrats.

Also Read: Classification of plants

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