Dr. Ingham is a joke IMO, but I think you know I feel that way about her. She has written so much incorrect info in the past it makes my head spin. It's not black and white with soil biota; they do use a majority of the ions they freed (i.e., solublized) during mineralization of OM, but they do not use all solublized ions, and those ions they do not used are solublized into the soil solution (ex., phosphate from mineralization of SRF).
spurr
Don't shoot the messenger..................
This may actually work out to be the eventual downfall of her reputation - we'll see.
CC