1. Relationship between soil pH and abundance of plant Species
Group leader: Jack Lim 5F (28)
Group members:
Vanessa Chan 5F (2)
Lala Mak 5F (16)
Gaudi Au Yeung 5F (22)

2. Research hypothesis
When pH reaches the optimum range, the plant coverage reaches the maximum
There is a relationship between the number of plant species and the pH value.

3. Procedure Use a quadrat to fix an area in 4 physical area
Record the coverage of the plants species
Collect the soil samples by using a small plastic bottles
Record the temperature of the soil using the thermometer for 1 minute
Record the pH value of the soil using pH paper for 1 minute

4. 1st record
Soil pH: 6.8
Temperture: 16.9°C
No. Of plants: 5

5. 2nd record
Soil pH: 6.4
Temperature: 16.3
No. of plants: 12

6. 3rd record
Soil pH: 5.6
Temperature: 18.9
No. of plants: 5

7. 4th record
Soil pH: 5.2
Temperature: 15.5
No. of plants: 8

8. Testing the ph value of the soil

9. Data analysis

10. Discussion The pH value decreases when the location at a upper region.
When the pH value reaches 6.4, the no. of plant species reaches the highest numbers.
When the pH value reaches 5.2, the no. of plant species reaches the lowest numbers.
It shows that the optimum value of pH for plant species to grow is 6.4.
There is a relationship between the plant species and the pH value.

11. Limitations and suggestions
Use the the digital thermometer (not suitable for recording the temperature of soil)
-> record the temperature near the soil, but not inside the soil
It is hard to collect soil pH value at the location as some of soil are dry.
-> use some stream water to moisten the dry soil first.

12. Conclusion
There is a relationship between the number of plant species and the pH value.

13. -The End-