Nitrogen Cycle Nitrogen Cycle is a biogeochemical process through which nitrogen is converted into many forms, consecutively passing from the atmosphere to the soil to organism and back into the atmosphere. It involves several processes such as nitrogen fixation, nitrification, denitrification, decay and putrefaction. Nitrification In this process, the ammonia is converted into nitrate by the presence of bacteria in the soil. Nitrites are formed by the oxidation of ammonia with the help of Nitrosomonas bacteria species. Later, the produced nitrites are converted into nitrates by Nitrobacter . This conversion is very important as ammonia gas is toxic for plants. The reaction involved in the process of Nitrification is as follows: 2NH 3 + 3O 2 → 2NO 2 – + 2H + + 2H 2 O 2NO 2 – + O 2 → 2NO 3 – Assimilation Primary producers – plants take in the nitrogen compounds from the soil with the help of their roo...
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