Midterms 4 Flashcards
is a biogeochemical process which
transforms the inert nitrogen present in the
atmosphere to a more usable form for living
organisms.
”
Nitrogen Cycle
is the process by which nitrogen is converted between its
various chemical forms. This transformation can be
carried out through both biological and physical
processes.
Nitrogen CYCLE
It involves a number of processes, including putrefaction,
degradation, nitrification, and denitrification.
Nitrogen CYCLE
Step of Nitrogen Cycle
Nitrogen Fixation
Nitrification
Assimilation
Ammonification
Denitrification
WHERE DOES NITROGEN
GAS COME FROM?
comes in both biological and inorganic
forms.
process that changes nitrogen from
the air into a form that plants can
use, mainly ammonia
Nitrogen Fixation
Type of Nitrogen Fixation
Biological Nitrogen fixation
Non-Biological
Industrial Nitrogen Fixation
Done by certain bacteria
Biological Nitrogen fixation
refers to processes that convert
atmospheric nitrogen (N₂) into
usable forms without the
involvement of living organisms.
Non-Biological
Haber-Bosch process, which combines
nitrogen from the air with hydrogen
(usually from natural gas) to create
ammonia
Industrial Nitrogen Fixation
process of enzymatic oxidation of ammonia
to nitrate by certain microorganisms in soil
and ocean
Nitrification
inorganic nitrogen in the form of nitrates,
nitrites, and ammonia is absorbed by the
green plants via their roots and then it is
converted into nitrogenous organic
compounds.
assimilation
It is the process of releasing ammonia by
certain microorganisms utilizing organic
compounds derived from the dead organic
remains of plants and animals and excreta
animals.
Ammonification
It is the process of releasing ammonia by
certain microorganisms utilizing organic
compounds derived from the dead organic
remains of plants and animals and excreta
animals.
Ammonification
The reduction of nitrates back into the large
inert nitrogen gas (N2), completing the
nitrogen cycle.
Denitrification
The reduction of nitrates back into the large
inert nitrogen gas (N2), completing the
nitrogen cycle.
Denitrification
is derived from the word “bio” meaning biosphere and “geo’’ meaning the geological components and “chemical” meaning the elements that move through a cycle.
Biogeochemical
is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out through both biological and physical processes.
nitrogen cycle
Some symbiotic bacteria, blue-green algae and some free-living bacteria are able to fix nitrogen as organic nitrogen.
Biological Nitrogen fixation
In this process,atmospheric nitrogen combines with oxygen (as ozone) during lightning or electrical discharges in the clouds and produces different nitrogen oxides
Non-biological Nitrogen Fixation
under great pressure at a temperature of 600’C and with the use of an iron catalyst, hydrogen and atmospheric nitrogen can be combined to form ammonia (NH3) in the haber-Bosch process.
Industrial Nitrogen Fixation
In this process, inorganic nitrogen in the form of nitrates, nitrites, and ammonia is absorbed by the green plants via their roots and then it is converted into nitrogenous organic compounds
Nitrogen assimilation
It is the process of releasing ammonia by certain microorganisms utilizing organic compounds derived from the dead organic remains of plants and animals and excreta animals.
Ammonification
A process of enzymatic oxidation of ammonia to nitrate by certain microorganisms in soil and ocean.
Nitrification
The reduction of nitrates back into the large inert nitrogen gas (N2), completing the nitrogen cycle.
Denitrification
Sometimes, nitrates of soil are locked up in the rocks while they are washed down to the sea or leached deeply into the earth along with percolating water. This phenomenon is known as
Sedimentation
