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
... This occurs in two steps: first, bacteria convert ammonia in to (nitrites) NO2-,
and ... This is important because plants can assimilate nitrate into their tissues,
As described earlier, fixation is the process of converting dinitrogen gas to
chemically reactive forms — where nitrogen combines with other elements such
Nitrogen. Of all the essential nutrients, nitrogen is required by plants in the largest
... Denitrification: Conversion of nitrate to atmospheric forms of nitrogen ...
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
Plants must secure their nitrogen in "fixed" form, i.e., incorporated in compounds
... Four processes participate in the cycling of nitrogen through the biosphere: ...
However, most of the ammonia produced by decay is converted into nitrates.
Nitrogen in the gaseous form cannot be absorbed and used as a nutrient by
plants ... During the conversion of nitrogen cyano bacteria will first convert
nitrogen into ... Plants absorb ammonium and nitrate during the assimilation
process, after ...
Nitrogen exists in the soil system in many forms and changes (transforms) very ...
In this biological process, nodule-forming Rhizobium bacteria inhabit the roots of
... a symbiotic relationship convert atmospheric N2 to a form the plant can use.
The majority of plant-available nitrogen is in the inorganic forms NH4<sup>+</sup> and NO3<sup>-</sup>
... The heart of the nitrogen cycle is the conversion of inorganic to organic ...
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,