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  • Nitrogen cycle is called a perfect cycle in the biosphere because it keeps or maintains the over all amount of nitrogen constant in atmosphere, soil and water.
  • Nitrogen cycle depends upon at least four different kinds of bacteria known as the decay causers, the nitrifiers, the denitrifiers, and the nitrogen fixers. There is a regular circulation of nitrogen through the air, soil, plants and animals through nitrogen cycle.
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13y ago

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