Decision made!

I now know for sure what I'll be doing for my SRP.
I'll be investigating the effect of different types of soils in the growth rate of plants.
The different types of soils are : clay, sand, chalk loam and peat
I've been doing a little bit of research, and I've decided that the plants I'll be using are some sort of bean plants, as beans grow quickly :)
Now all i need to do is get this approved, so I can get started!