Nitrogen drawdown.???
...If air is 78.1% Nitrogen ... why does mulch (which lays on the surface) supposedly affect soil nitrogen.
Sure....if there is "hot" soil-mix added I get it ...or if mulch is incorporated into the soil... Clearly there would be (physical) contact with soil air ...& not so much with atmospheric air....and I see why the nitrogen conversion pathway would deplete soil nitrogen...albeit temporarily.
Why would soil air (N) be depleted by mulching... when there are zillons of free molecules just floating around above???
Never, ever seen it happen! and been mulching gardens for 20+ years.
(PS Got my Scientist hat on today)
Mulch = BEER money for the crew
