The Changing Nitrogen Cycle

nitrogen cycle  Nitrogen cycle Atmospheric nitrogen cannot be used directly by plants and animals Nitrogen Earth's atmosphere contains about 78% nitrogen Plants cannot use nitrogen in its N2 form, so it must be transformed through a process

Nitrogen exists in the atmosphere as N 2 ‍ gas In nitrogen fixation, bacteria convert N 2 ‍ into ammonia, a form of nitrogen usable by plants  Nitrogen Cycle- Steps and Significance Its is the movement of nitrogen between the atmosphere, biosphere, and geosphere in different forms

Nitrogen from fertilizers sinks into soils, often creating conditions that favor the growth of weeds rather than native plants Nitrogen then washes into The biological nitrogen cycle mainly consists of internal interactions within the reactive nitrogen pool and in- and out-flow between reactive