Nitrate is a soluble form of nitrogen that appears at low concentrations in most surface waters as a result of natural biological processes.
(Nitrate; is; a soluble form of nitrogen that appears at low concentrations in most surface waters as a result of natural biological processes) (a soluble form of nitrogen; appears; L:at low concentrations in most surface waters as a result of natural biological processes)
Nitrate a soluble form of nitrogen
is appears
a soluble form of nitrogen that appears at low concentrations in most surface waters as a result of natural biological processes
L:at low concentrations in most surface waters as a result of natural biological processes