Question

write about nitrogen cycle ?​

Answer 1

Explanation:

Our atmosphere consists of 78% nitrogen gas.

Nitrogen is one of the essential constituents of all

living organisms as a part of proteins, chlorophyll,

nucleic acids and vitamins. The atmospheric

nitrogen cannot be taken directly by plants and

animals. The nitrogen-fixing bacteria and algae

present in the soil fix nitrogen from the atmosphere

and convert into nitrite and nitrate forms. Once

nitrogen is converted into these usable forms, it can

be utilised by plants through their root system. This

is the process of 'FIXING' OF NITROGEN.

Answer 2

Explanation:

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is atmospheric nitrogen,making it the largest source of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems.