How did ancient people get the nutrients for doing hydroponics? Did they use Ashes from a fire?

October 1, 2011 | Filed under: Aquaponics | Posted by:

Question by Jave: How did ancient people get the nutrients for doing hydroponics? Did they use Ashes from a fire?
People say that hydroponics is complicated, but if ancient people could do it, then it must be simple.
How did they isolate the nutrients?

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