Biology Improvement in Food Resources - part 1 Video Lecture - Class 9

hello friends this video on improvement
in food resources part 2 is brought to
you by exam few calm no more fear from
exam now let us look at how can we
improve the crop hint right now when we
think of crop what all comes to our mind
I mean what are the different crops I
mean I I really don't need to explain
you what is a grow-op and what are the
different crops but just to have an
introductory slide it'll quickly look at
the different types of crops which are
cultivated and which we which we use or
which we consume in our day-to-day life
let us talk about the pulses when you
think of pulses in India be mostly call
it as dally right we generally have it
with either rice or with chapati so it
is a very common or you can say it is a
daily food for each of us so in pile
pulses you have many different kinds of
pulses like gram pea black gram green
gram lentils so these are the different
types of pulses and the pulses are a
very good source of protein so you will
often see that people see that you
should eat you should have lot of pulses
in your diet because it is a good source
of protein in let's talk about the
cereals which form the basic food for us
like rice wheat maize millet these are
the cereals now rice and wheat and I am
sure all of you are aware of when I talk
of means what this means mazes nothing
but Makai this is the this is a term
which most of the Indians will be for me
here with right so this means millet
millet is also commonly known as bara so
we use this as our main food for example
in order to prepare rice pulao or in
order to prepare chapati right so these
are the things which we consume in our
day to day life again these cereals are
a very good source of carbohydrates now
as I mentioned before in order to leave
being our body needs nutrients so it is
not only just one nutrient which it
needs it needs everything in a
combination it needs vitamins minerals
proteins carbohydrates fats everything
in a correct proportion right so it is
not that you keep consuming only rice
and you think that only by consuming
carbohydrates anything else that is not
possible
so our diet should have a combination of
everything next if we talk about the oil
seeds the seeds which can generate oil
for example groundnut castor soya bean
see same linseed so you would have heard
of this oil also the sunflower oils
which are available in the market they
are also obtained from these oil seeds
similarly you would have heard of this
castor oil castor oil often some people
often put it on here because they say
that castor oil will help in hair growth
right similarly you have soya beans so a
beans they help in getting Nemec from
soya beans you not only get so our oil
but you also get things like soya sauce
soya chunks there are so many things
which you actually obtain from soya bean
and these oil seeds are also a good
source of fats right okay then we have a
variety of vegetables you have green
vegetables you have colored vegetables
like and they are all a very good source
of vitamins and minerals and of course
we have fruits which are again a good
source of vitamins and minerals so a
diet which has a combination of all of
this is said to be a good guide which
can keep you healthy right so these are
the crops which are cultivated in fees
right so now what are we going to study
is how can we improve the yield of these
crops how can we improve the production
of these crops now how is how do we know
that I mean what is the basic concept
behind this improvement in crop yields
now since we have aware
of crops which are being cultivated and
we it is observed that different crops
need different climatic conditions they
need different temperature they need
different photo periods for their growth
for example this one I talked about so
many crops right in the last slide but
it doesn't mean that all of them needs
the similar kind of environment for
their growth for example if you take
wheat wheat might have its own
requirements it needs a specific type of
a climate it needs a specific type of
temperature for its growth whereas if
you take the example of a say cotton
maybe cotton needs a completely
different environment all together so
each crop will need a different type of
climate a different type of temperature
a different type of sunlight duration
sunlight duration means the amount of
time or the period of time for which it
needs exposure to sunlight sunlight is
very very important for plants right
because it is in the presence of
sunlight that plants prepare their food
by the process called photosynthesis so
all these requirements vary with each
crop so there are some crops which grow
only in rainy season for example maize
cotton these are some of the examples of
crops which grow only in rainy season
because these crops wants more water
correct
similarly there are other crops which
grow in winter season they don't need
too much of water but they want the
climate to be cold they want the
temperature to be less so examples of
such crops are wheat gram mustard
linseed these are some of the examples
of crops which draw only in winter
season so now because of this different
requirements of the different crops we
have been able to come up with some
techniques which can improve the yield
of the crop so what are those techniques
the first one is crop variety
improvement next is crop production
improvement and the last one is crop
protection improvement so these are the
three techniques which we will discuss
in this lesson and which are helpful in
improving the yield of crops so we will
talk about each of them
in detail one by one but just a quick
one liner discretion on each of them so
when I talk of crop variety improvement
what do we do here we actually improve
the variety of the crop that means we
actually improve the quality of the crop
so that the outcome which we get or so
that the result which we get is of good
quality in crop production improvement
we focus on the amount of crop which is
getting generated so we ensure that more
and more crops get produced so for that
we apply some techniques again in crop
protection management we ensure that the
crops stay protected nobody or no
outsiders should come and harm the crops
because if somebody harms the crop again
that will affect them crop yield right
so here we will take care of the crop
protection thank you
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