The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted
into various chemical forms as it circulates among the atmosphere and terrestrial
and marine ecosystems. The conversion ...
Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as
NO2-, in a ... This occurs in two steps: first, bacteria convert ammonia in to (nitrites
) NO2-, and then other ... Nitriates are a form of nitrogen that is usable by plants.
The process is called nitrogen fixation.
Nitrogen. Of all the essential nutrients, nitrogen is required by plants in the largest
... Denitrification: Conversion of nitrate to atmospheric forms of nitrogen ...
Aug 2, 2010 ... The cycling of nitrogen among its many forms is a complex process that ...
Nitrogen fixation is the process by which gaseous nitrogen (N2) is converted to ...
Plants take up these forms of nitrogen through their roots, and ...
Feb 21, 2014 ... The fixation of nitrogen – the conversion of atmospheric nitrogen into a form that
plants can use – is a process fundamental to world agriculture.
Most organisms (including humans) can't use nitrogen in the gaseous form N2 for
... "Fixation" is the conversion of gaseous nitrogen to ammonia or nitrate. ...
Nitrates feed plankton (microscopic plants and animals that live in water), aquatic
Overview: The nitrogen cycle involves three major steps: nitrogen fixation, ...
These organisms convert nitrogen in the soil to ammonia, which can then be
taken ... the form of nitrates while animals assimilate their nitrogen by eating the
The problem is, however, that plants are unable to use nitrogen in its elemental
form—as dinitrogen. Any process by which elemental dinitrogen is converted to a
The process of biological nitrogen fixation was discovered by the Dutch ... Plants
cannot fix nitrogen on their own, but need it in one form or another to make ... in
this cycle converting nitrogen containing compounds to ammonia, NH3, nitrates,