Nitrogen cycle diagram: Nitrogen Fixation

Nitrogen Fixation: In the nitrogen cycle, molecular nitrogen enters the biological pathways primarily through an assimilation by certain microorganisms, particularly bac­teria, and also through lightning. Such a pro­cess is referred to as nitrogen fixation. Nitrogen fixation is carried out by cer­tain species of bacteria and cyanobacteria in both aerobic and anaerobic environments. Some are free-living, occurring in soil or in water, while others exist in symbiotic rela­tionships with ... This cycle shows how nitrogen moves from atmosphere to living beings (plants and animals) and then back to atmosphereLet’s see what happens in the Nitrogen CycleAtmosphere Has 78% NitrogenNitrogen gets fixed byRhizobium bacteriaBlue Green AlgaeLightningNote: Rhizobium Bacteria lives in roots of pea Learn about the nitrogen cycle, the flow of nitrogen through ecosystems, and its importance for plant growth and food production. Explore the stages of nitrogen fixation, nitrification, assimilation, ammonification, and denitrification, and the role of bacteria and enzymes. Nitrogen is present in the environment in a wide variety of chemical forms including organic nitrogen, ammonium (NH+4), nitrite (NO−2), nitrate (NO−3), nitrous oxide (N2O), nitric oxide (NO) or inorganic nitrogen gas (N2). Organic nitrogen may be in the form of a living organism, humus or in the intermediate products of organic matter decomposition. The processes in the nitrogen cycle is to transform nitrogen from one form to another. Many of those processes are carried out by microbes ...