Question

Explain the nitrogen cycle.
Plz tell fast guys .​

Answer 1

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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 atmosphere 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.

This figure summarizes the global cycling of reactive nitrogen. includes industrial fertilizer production, nitrogen fixed by natural ecosystems, nitrogen fixed by oceans, nitrogen fixed by agricultural crops,NOx emitted by biomass burning, NOx emitted from soil, nitrogen fixed by lightning,NH3 emitted by terrestrial ecosystems, deposition of nitrogen to terrestrial surfaces and oceans,NH3 emitted from oceans,ocean NO2 emissions from the atmosphere, denitrification in oceans, and reactive nitrogen burial in oceans.[5]

Diagram of nitrogen cycle above and below ground. Atmospheric nitrogen goes to nitrogen-fixing bacteria in legumes and the soil, then ammonium, then nitrifying bacteria into nitrites then nitrates (which is also produced by lightning), then back to the atmosphere or assimilated by plants, then animals. Nitrogen in animals and plants become ammonium through decomposers (bacteria and fungi).

Schematic representation of the flow of nitrogen through the ecosystem. The importance of bacteria in the cycle is immediately recognized as being a key element in the cycle, providing different forms of nitrogen compounds able to be assimilated by higher organisms

The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle. Human modification of the global nitrogen cycle can negatively affect the natural environment system and also human health.

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Answer 2

Answer:

Nitrogen gas makes up 78% of our atmosphere.

Plants takes up atmospheric nitrogen through root nodules where Rhizobium bacteria converts it into simpler form for plants use

Then those plants are eaten by animals. After the death of plants and animals the nitrogen is again transferred to soil and forms ammonia.And ammonia reacts with bacteria and forms nitrites and nitrates through the process of nitrification and by denitrification it again get converted into atmospheric nitrogen

Hope this help