Learning About The Nitrogen Cycle

The most important part of the Nitrogen cycle is the Bacteria. Bacteria helps the Nitrogen change between different areas of the cycle so it can be used. When Nitrogen is absorbed by the soil different bacteria helps it to change areas so it can be absorbed by plants. Animals get their Nitrogen from the plants. For us, people, we need Nitrogen to make amino acids which make proteins and our whole body up of DNA and RNA. DNA is a molecule that carries most of the genetic instructions used in the development, functioning and reproduction of all known living organisms and viruses. RNA is a nucleic acid present in all living cells.

Nitrogen in plants is used to make proteins. They take in Nitrogen as Nitrates from the soil and they can’t absorb Nitrogen from the air. In what form is Nitrogen taken into a plant? ‘Nitrogen is taken into a plant from the Nitrates. Mutualistic is the word to describe the relationship between the plant and the nitrogen fixing bacteria. The Microorganisms that turns Nitrogen into gas into Ammonia is called the Nitrogen Fixing bacteria. Nitrifying bacteria can convert Nitrites to nitrates and Denitrifying bacteria can convert ammonia into Nitrates.


The Nitrogen cycle relates to my STEM Air, Soil and Water Project by the whole set up. The fertilizer is going to have Nitrogen in it and it’s going to affect the Nitrogen Cycle. To Grow more crops people have been transforming Nitrogen from the atmosphere into Nitrogen fertilizers and then adding the fertilizers to the plants. This has been a little successful, letting people farm on lands that had not been as productive in the past, and to produce enough food for growing populations of people. But, fertilizers are overused and that can cause big problems. Nitrogen from fertilizers sink into soils, often creating conditions that favor the growth of weeds. Nitrogen then washes into waterways, causing a surplus of nutrients, a situation called Eutrophication.


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