[USCC] Soil test levels for nitrogen in compost

[Steve Diver]

I'm looking for interpretive guides to understanding
ammonium-nitrogen in comparison to nitrate-nitrogen on
lab tests for soils and composts.  

For example, what are the normal ranges for L, M, H, VH. 

Interpretive numbers on NO3-N is easy to find, but 
guidelines on NH4-N seems to be scarce.

And then how do you interpret the numbers in relation to
soil/compost activity when one is 2x-4x higher than the
other.  

It appears that NH4-N is normally performed for
manure analysis as part of a nutrient management 
plan.

Much appreciated,
Steve Diver