In the DO BOD Nitrogen,, and the conclusion can Phosphorus relationship is as follows: if the DO high while the BOD, nitrogen, phosphorus. Show that the water was low, with the oxygen in the water with oxygen, is a little dirty, but if that DO ratio, low BODNitrogen,Phosphorus is high, so water is harmful to the creatures and plants that live in the water, is very dirty, and lead to the phenomenon. Eutrophication caused by nitrogen and phosphorus.
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