Question

The amount of nitrogen fixed by natural and anthropogenic processes is approximately equivalent to 90-149 Tg (tetra grams) N₂ fixed year. What are the sources of natural and anthropogenic nitrogen?

Answer 1

Nitrogen:

1. Nitrogen is the most abundant gas found in the atmosphere, it occurs in about 78% of the earth's atmosphere.
2. The sources of natural nitrogen are lightening, free-living bacteria, Rhizobium.
3. The sources of anthropogenic nitrogen are fertiliser production, combustion.