I’m going to do this huge project for school in biology (aka Extended Essay).

I chose to do a lab experiment on rhizobiums, though there are so many things you can measure like what affects the growth of nodules on plants, etc. Though I don’t know how to measure and what to measure, what plants to use, how many plants, and everything included.

Well, I’m not asking for you to write me a whole method, because thats my job, but what kind of things do you think I should investigate, any opinions?

Please help, because this is a very important project. thx