Nitrogen Cycle (1)

Nitrogen cycle

Natural cycle that recycles nitrogen between plants and animals, and the atmosphere, soil and water

Nitrogen gas in air

78%

Process in the nitrogen cycle (I)

Process of nitrate ion addition to the soil

Process in nitrogen cycle (II)

Process of nitrate ion extraction from the soil

Example process of adding nitrate ion to the soil

Lightning and volcanic eruptions

Example of process extract nitrate ions from the soil

Nitrate leaching

Lightning and volcanic eruptions

Heat energy released at high temperature oxidizes nitrogen in the air to form nitrogen dioxide

Nitrate leaching

Nitrate ions in the soil dissolve in water & flow into the rivers

Importance of nitrogen cycle (1)

Maintaining nitrogen content in the air

Importance of nitrogen cycle (2)

Reducing environmental pollution