Question

Describe the nitrogen cycle with the help of labelled diagram

Answer 1

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. ... Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.

Answer 2

Answer:

The nitrogen cycle exists the biogeochemical cycle by which nitrogen exists transformed into multiple chemical forms as it spreads among the atmosphere, terrestrial, and marine ecosystems. Essential functions in the nitrogen cycle have fixation, ammonification, nitrification, and denitrification.

Explanation:

Nitrogen-cycle exists as a biogeochemical cycle. It represents the conversion of atmospheric nitrogen to easier molecules in soil and water that get transformed into more complex molecules and ultimately exist converted back to the easy nitrogen molecule in the atmosphere. The given figure illustrates the nitrogen cycle.

Two techniques applied in the cycling of $\mathrm{N}_{2}$ in the environment exist

1. Nitrogen fixation: $\mathrm{N}_{2} \longrightarrow \mathrm{NO}_{3}{ }^{-}$or $\mathrm{NH}_{4}$

It exists the method where atmospheric nitrogen exists transformed into water-soluble nitrates. This step exists achieved by organisms like Rhizobium, Azotobacter, and blue-green algae.

2. Nitrification: $\mathrm{NH}_{3} \longrightarrow \mathrm{NO}_{2}^{-} \longrightarrow \mathrm{NO}_{3}^{-}$

It exists the method in which ammonia exists rather than transformed into nitrites and then into nitrates. This step exists executed by nitrifying bacteria like Nitrosomonas and Nitrobacter.

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