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What\'s nitrogen cycle? |
| Answer» 78% of the total gases in the atmosphere is nitrogen but it cannot be used by plants and animals directly. The nitrogen-fixing bacteria and algae present in the soil fix nitrogen from the atmosphere and convert into nitrite and nitrate forms. Once nitrogen is converted into these usable forms, it can be utilised by plants through their root system. This is the process of \'fixing\' of nitrogen. Animals feeding on plants get proteins and other nitrogenous compounds.When plants and animals die, bacteria and fungi present in the soil convert various nitrogenous compounds into nitrates and nitrites. Certain specialized bacteria convert nitrates and nitrites into nitrogen gas. As a result, the percentage of nitrogen in the atmosphere remains more or less content. | |