Finnish to English Science Biology (-tech,-chem,micro-) Websites

So here is the sentence:

hajottajamikroobit tyostavat eloperaista ainesta ja vapauttavat kasveille ravinteita vastineeksi niilta saamastaan hiilesta

I have:

moulds work on biogenic substances releasing nutrients for plants from the carbon they obtain from them

as you can see, I am lost here

any helpers out there?

thanks

Spencer