Module 2 : Contaminants and pathways into atmosphere

Lecture 2 : Nitrogen Cycle

Free Living Bacteria
Highly specialized bacteria live in the soil and have the ability to combine atmospheric nitrogen with hydrogen to make ammonia (NH3).

 

 

Symbiotic Relationship Bacteria
Bacteria live in the roots of legume family plants and provide the plants with ammonia (NH3) in exchange for the plant’s carbon and a protected home.