Question
With the help of suitable diagram describe nitrogen cycle.
✓
Answer
Nitrogen Cycle:
$2\text{NH}_3+3\text{O}_2\xrightarrow{ \ \ \ \ \ \ \ \ \ \ }2\text{NO}_2^{-}$
$2\text{NO}_2+\text{O}_2\xrightarrow{ \ \ \ \ \ \ \ \ \ \ }2\text{NO}^-_3$
- Plants compete with microbes for the limited nitrogen that is available in soil Thus, nitrogen is a limiting nutrient for both natural and agricultural eco systems.
- In nature, lightning and ultraviolet radiation provide enough energy to convert nitrogen to nitrogen oxides $\left(\mathrm{NO}, \mathrm{NO}_2, \mathrm{~N}_2 \mathrm{O}\right)$.
- Industrial combustions, forest fires, automobile exhausts and power-generating stations are also sources of atmospheric nitrogen oxides.
- Decomposition of organic nitrogen of dead plants and animals into ammonia is called ammonification. Some of this ammonia volatilises and re-enters the atmosphere but most of it is converted into nitrate by soil bacteria in the following steps:
$2\text{NH}_3+3\text{O}_2\xrightarrow{ \ \ \ \ \ \ \ \ \ \ }2\text{NO}_2^{-}$
$2\text{NO}_2+\text{O}_2\xrightarrow{ \ \ \ \ \ \ \ \ \ \ }2\text{NO}^-_3$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
When and where does reduction division take place in the life cycle of a liverworts, a moss, a fern, a gymnosperm and an angiosperm?
Describe transpiration pull model of water transport in plants. What are the factors influencing transpiration? How is it useful to plants?
Draw a standard ECG and explain the different segments in it.
Describe prophase I of meiotic cell division. How is it different from prophase II of meiosis?
An elderly woman slipped in the bathroom and had severe pain in her lower back. After X-ray examination doctors told her it is due to a slipped disc. What does that mean? How does it affect our health?
How far does Selaginella one of the few living members of lycopodiales (pteridophytes) fall short of seed habit.
Explain the following processes: Depolarisation of the membrane of a nerve fibre.
Describe briefly the main steps on glycolysis from triose phosphate onwards. Highlight the reactions which release energy.
What is called microbody? Write any four differences between 80S and 70S ribosomes.
In the following flow chart, replace the symbols a,b,c and d with appropriate terms. Briefly explain the process and give any two application of it.
