Using waste for propulsion ?

On Dec/3/2016 at 6:57 PM, Fred J. McCall wrote :
Harri Tavaila wrote:

29.11.2016, 4:53, Fred J. McCall kirjoitti:

Try growing plants in soil with no carbon in it and see how that works
for you (it mostly will work very poorly, if at all).

I believe this is essentially what hydroponic farming is about.


Yes, but that's not what's being discussed. If you 'predigest'
everything for the plants, you can grown them in air.


Here is the silly challenge you gave me:
On Nov/30/2016 at 6:31 AM, Fred J. McCall wrote :
«The proof is in the pudding. Go grow some plants of various types in
«sand with no carbon content. Fertilize at will, but nothing with
«carbon as a component. Let us know how that goes.»

Oh! So that meant fertilize at will but not using the ingredients that
work. Moving the goalpost again?


Alain Fournier