The nitrogen cycle describes the biological and physical processes by which nitrogen is converted between different chemical forms in the environment. These forms include ammonium, nitrite, nitrate, nitrous oxide, nitric oxide, and elemental nitrogen gas. Key processes in the nitrogen cycle are fixation, where bacteria convert nitrogen gas from the air into forms plants can use; ammonification, where dead remains release ammonium; and nitrification, where ammonium is converted to nitrites and nitrates. The cycle is essential for providing nitrogen to support life on Earth.

1. Nitrogen Cycle
Prepared and Presented by Yash Bhatt

2. What isNitrogen cycle?
• The nitrogen cycle is the process by
which nitrogen is converted between its
various chemical forms. This
transformation can be carried out through
both biological and physical processes.
Important processes in the nitrogen cycle
include fixation, ammonification, nitrificatio
n, and denitrification.

3. Formsof Nitrogen
Nitrogen exists in six chemical forms:-
• Ammonium (NH4+)
• Nitrite (NO2-)
• Nitrate (NO3-)
• Nitrous Oxide (N2O)
• Nitric Oxide(NO)
• Inorganic Nitrogen(N2)

4. Process
• Lightning- it makes air hot and forces N2
and O2 to combine. They make chemicals
which are washed into the soil, where they
from nitrates.
• Fixation- Nitrogen –fixing bacteria use N2
from air to make nitrates for the plants.
• Ammonification: ammonium compounds
are released from the dead remains of
plants and animals to the soil.
• Nitrification- these ammonium compounds

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