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I'm doing a biology investigation on the effect of soil colour on root and shoot growth in plants and was wondering if anyone had any useful background reading/other information that would help me ? It was a project suggested by my teacher and I'm meant to use coloured cellophane etc to change...

I've taken 2 AP courses in history, but this is my first science one.

The change oil light in my car comes on every so often but I usually have it cut off when I have my oil changed. My husband changed my oil last and we don't know how to cut it off.