The majority of Earth's atmosphere is nitrogen (78%). This makes Earth the largest pool of nitrogen. However, atmospheric nitrogen has limited ability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems.
There are both organic and inorganic reservoirs of nitrogen found on Earth.
Organic reservoirs:
Inorganic reservoirs:
There are both organic and inorganic reservoirs of nitrogen found on Earth.
Organic reservoirs:
- amino acids
- peptides
- nucleic acids
- proteins
Inorganic reservoirs:
- man made fertilizers
- ammonia