Question
Draw a neat flow chart of Nitrogen cycle. Briefly explain the various processes involved in nitrogen cycle.
✓
Answer
Process involved in nitrogen cycle are explained below :1. Nitrogen Fixation:Process : Conversion of atmospheric Nitrogen (inert) into reactive compounds.
Agents : Bacteria and Bluegreen algae (cyanobacteria), (microorganism), Rhizobium.
Occurrence : Root nodules of leguminous plants peas, beans, etc.2. Nitrogen Assimilation:
Process : Plants absorb nitrate ions and made into organic matter like proteins and nucleic acids.
Agents : Plants, animals.3. Ammonification :
Process: Decomposition of nitrogenous waste into ammonium compounds.
Micro organism : Putrefying Bacteria, and fungi.
End Products : Urea, Uric acid (or) Ammonia.4. Nitrification
Process: Ammonium compounds are oxidised to soluble nitrates.
Bacteria : Nitrification is caused by nitrifying bacteria.5. Denitrification:
Process: Reduction of nitrate ions of soil into gaseous nitrogen which enters into the atmosphere.
Bacteria : Pseudomonas sp.
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