Table 3 Conversion factors from molecular to elemental form for all nutrients in our sample requiring conversion17.

From: Harmonized nitrogen and phosphorus concentrations in the Mississippi/Atchafalaya River Basin from 1980 to 2018

NUTRIENT NAME

REPORTED MOLECULAR FORM

MULTIPLY BY

DESIRED ELEMENTAL FORM

AMMONIA

as NH3

0.822

as N

AMMONIUM

as NH4

0.776

as N

NITRATE

as NO3

0.225

as N

ORTHOPHOSPHATE

as PO4

0.326

as P

Back to article page