Ammonification Video Lecture - NEET

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now we will talk about the fourth and
the last process of the nitrogen cycle
that is a modification so what is a
modification process that converts
organic nitrogen into ammonia um so you
might be wondering what is this
conversion of nitrogen to ammonia now
because when we were talking about
nitrogen fixation we told that that is
all about converting the atmospheric
nitrogen gas into ammonium now again we
are saying we have to convert organic
nitrogen so what is this organic
nitrogen
now when I say organic nitrogen I mean
the nitrogen which is present inside the
body of a living organism this is how I
would write that living organism needs
nitrogen to form proteins DNA amino
acids right so now in an organism guys
or when the organism
excretes wastes then nitrogen is present
in their tissues in the form of organic
nitrogen so converting that organic
nitrogen into ammonia there is known as
a modification so please understand the
difference between a modification and
nitrogen fixation in nitrogen fixation
you convert the atmospheric nitrogen gas
into ammonia but in a modification you
convert the organic nitrogen which is
present in the tissues of living
organisms once they are dead or once
they excrete
so this conversion is called a
modification the microbes which are
involved in this process are prokaryotes
hosting and some of the sunlight so
these microbes decompose the tissue and
release the inorganic nitrogen back into
the ecosystems as ammonia and this
ammonia is available for uptake by
plants and their microbes for growth for
example this is the case so this process
was at most any nitrogen
pneumonia this process was nitrogen
fixation right now ammonia to nitrate
this process was nitrification right now
nitrate back to atmospheric nitrogen
this process was
denitrification and now when this plant
dies suppose the plan values or the
plant excretes out something so that
we'll also have some organic nitrogen so
converting that organic and nitrogen so
that organic nitrogen into ammonia that
is called a modification suppose this is
wastes so this is a modification so the
ammonia which is produced is it can
begin to utilized by the plants right so
these processes all together form the
nitrogen cycle so now let us quickly
look at the nitrogen cycle as a whole
this is how the entire nitrogen cycle
will look like this is the atmospheric
nitrogen this atmospheric nitrogen is
utilized by the nitrogen fixing bacteria
and they convert it into ammonia and the
ammonia further is converted into
nitrites and then it is converted to
nitrate this nitrates can be utilized by
the plants when the plants die the
decomposers will act on them and a
modification will take place so ammonia
will again be formed right and again d
nitrifying bacteria will convert the
nitrates in back into that mysteric
nitrogen so this entire process is known
as then I Trojan syphon now with this we
have reached towards the end of this
lesson then we will conclude with giving
some significance to soil because soil
is the reservoir of all the essential
elements we spoke about so many
important elements like we spoke about
nitrogen phosphorus - your magnesium
iron so many of them and everywhere you
saw that most of them are obtained from
the soil so soil is the reservoir of
one essential element so if you look at
the significance of soil in the life of
a plant it is like huge
they provide nutrients like phosphorus
sulfur sodium potassium the supplied
minerals the harbors the nitrogen fixing
bacteria because when you talk about
Rhizobium for any other nitrogen fixing
bacteria they are present in the soil
from the soil they enter into the root
of some plants and for modules and all
those things but initially they are
present in the soil so soil provides a
place or a shelter for those bacteria as
well so I who supplies water to the
plants so I also supplies either to the
roots of the plans of the so that the
roots can breathe in and last but not
the least so i provides the base so that
it can give Anchorage to the roots so
that because the plants want to be
steady so that is why the roots should
get properly fixed understand the soil
right so the soil is like a
multi-purpose thing for a plant without
soil it is very difficult for the plants
to exist however the hydroponics
techniques are there but so I has got
everything into it but when you actually
try to do the same using hydroponics you
need to take care of the nutrient
solution that nothing should be missing
there so soil is an excellent reserve
oil of all essential elements thank you
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