Revisiting soil inorganic N transformations

This may be a know issue, but I was terrified to see what profiles of inorganic N look like in this single point boreal case.
The behavior isn't surprising, since plants and heterotrophs have first crack at inorganic N (there's very little NO3 produced in surface soils), but below the rooting zone it seems like all the inorganic N is nitrified and sits around. One more reason to tackle the ECA (or similar) approach in our nutrient code...