# ``particulate_organic_nitrogen`` ## Properties :dimensions: N_PROF, N_LEVELS :dtype: float64 ## Default Attributes | Attribute | Value | |-----|-----| |``whp_name`` | ``PON`` | |``whp_unit`` | ``UG/KG`` | |``units`` | ``ug/kg`` | |``C_format`` | ``%9.3f`` | |``C_format_source`` | ``database`` | ## Description Particulate organic nitrogen