Dosing Nitrogen > what counts, elementary or molecular

[Kosmo83]

Now I sent 2 mails, one to ICL and one to Compo to help me with this question.

For me, it is logical, to count elementary nitrogen for PPM fertilizing, the plant won't use the OH, or H-atoms/ions.

If there was a label like this 20% N (40% nitrat, 60% ammonium) I have never asked.