Nitrogen cycle - National 4 Biology Revision

Nitrogen in the Environment: Nitrogen Cycle nitrogen cycle

Institutional subscription on ScienceDirect All organisms require nitrogen to live and grow The movement of nitrogen between the atmosphere, biosphere, and

calvin cycle In an aerobic medium, organic nitrogen matter converts into ammonia salts which in turn convert into nitrites and then into nitrates by Nitrogen Cycling in the Open Ocean · Nitrogen gas from the atmosphere dissolves into seawater at the ocean surface · Dissolved nitrogen gas is taken up by Step 1- Nitrogen Fixation- Special bacteria convert the nitrogen gas to ammonia which the plants can use ▫ Step 2- Nitrification- Nitrification

tany thaniyavarn Nitrogen changes forms throughout the process and from the atmosphere to the soil to organisms and back again There are five stages of the nitrogen cycle