Wednesday 17 June 2009

Soil survey

On Friday,5 June, our team had a change of focus for our environmental studies. Instead of being at the Wetlands area, we were at Aranui Park which is next door to the wetlands area.

We had a special task to accomplish. David, Janet and Claire, a guest scientist, set us the task of testing the soil in an area that is to be planted in the near future.
The soil needed to be tested so that they can figure out which plants will grow best in that area.

This task had to be carried out using the rules of fair testing. We had to be as careful as possible with our measurements and systems so the results were true and accurate. There were 3 sites and we had to measure the depth and PH levels of the peat (soil with a lot of decaying plant material) and clay layer. We were hoping we would be able to get right down to the gravel layer. We were also trying to find out at what depth the water table was.
The diagrams below show the results for each site.





This was a great opportunity to develop skills and understand more about the scientific method used to decide which plants should be planted in the area. Everyone enjoyed the task and worked well in their teams to achieve the goals.