In another video he went on about how hydrogen is measured in pH for potential Hydrogen. That's atmospheric like N, right?I rarely mention hydrogen because it comes from water.
I don't recall him saying how to add hydrogen other than fixing pH, but maybe that comes in naturally when the tilth is correct with adequate Ca levels?
Edit: Just read your 'Hydrogen comes from water' response. Looks like I was close in that it's environmental but from water, not air. Which I guess makes sense if I stopped to think about it. Water = H2O and all that...