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Science Class 8 > Crops Production and Management > Flashcards

Crops Production and Management Flashcards

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1
Q

What is Photosynthesis?

A

the process by which green plants turn carbon dioxide and water into food using energy from sunlight

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2
Q

When plants of the same kind are
cultivated at one place on a large scale,
it is called _________.

A

When plants of the same kind are
cultivated at one place on a large scale,
it is called Crop.

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3
Q

On what basis are the crops classified?

A

On the basis of Season.

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4
Q

I am a crop that needs a lot of water, so you cannot grow me in the low rainy season. Who am I?

A

Kharif Crops: The crops which are
sown in the rainy season are called
Kharif crops.

Paddy, maize, soybean, groundnut, and
cotton is a Kharif crop.

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5
Q

In which months Kharif Crops are grown?

A

The rainy season in India

is generally from June to September.

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6
Q

I am crop that you celebrate harvesting in the month of March?

A

Rabi Crop: The crops are grown in the
winter season (October to March) are
called rabi crops.

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7
Q

What are some examples of Rabi Crop?

A

Examples of rabi
crops are wheat, gram, pea, mustard
and linseed

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8
Q

What will happen if I grow Rabi Crop in the month of the Rainy season?

A

Our crops will not be able to remain dry and they will start to rot due to a lot of water and Lot of Sun will also destroy the crop.

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9
Q

What will happen if I grow the Kharif crop in the month of Winter?

A

the crops will not receive sufficient water and sunlight, so due to this, the crops will rot.

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10
Q

What are the various Basic Practices of Crop Production?

A

(i) Preparation of soil
(ii) Sowing
(iii) Adding manure and fertilizers
(iv) Irrigation
(v) Protecting from weeds
(vi) Harvesting
(vii) Storage

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11
Q

I am that one Step without which you cannot start farming, your roots will not be able to breathe without me.
Who am I?

A

The preparation of the soil is the first step

before growing a crop.

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12
Q

What is the meaning of preparation of the soil?

A

One of the most important tasks in agriculture is to turn
the soil and loosen it.

This allows the roots to penetrate deep into the soil.

The loose soil allows the roots to breathe easily even when they go deep into the
soil.

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13
Q

Why is the preparation of soil important?

A

The loosened soil helps in the growth
of earthworms and microbes present in
the soil.

These organisms are friends of
the farmer since they further turn and
loosen the soil and add humus to it.

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14
Q

Why are Earthworms and microorganisms called Farmer’s friends?

A 
dead plants and animals
get decomposed by soil organisms. In
this way, various nutrients in the dead
organisms are released back into the
soil. These nutrients are again absorbed
by plants.
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15
Q

The process of loosening and turning

of the soil is called _______.

A

tilling or ploughing.

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16
Q

The ploughed field may have

big clumps of soil called ____

A

crumbs

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17
Q

Why do we need to level the soil?

A

Leveling the field is beneficial for

sowing as well as for irrigation.

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18
Q

What are the various tools for leveling the field?

A

The main tools used for this purpose are

the plough, hoe, and cultivator.

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19
Q

What should farmers check before sowing the seeds?

A

Check the quality of seeds.

20
Q

How to check the quality of seeds?

A

Damaged seeds
become hollow and are thus lighter.
Therefore, they float on water.

21
Q

What you sow, so shall you reap. Which step am I?

A

Sowing

22
Q

What are the various tools to sow seeds?

A

Traditional funnel-like tool, Seed Drill?

23
Q

How is Seed Drill a good option?

A

sows the seeds uniformly at equal distance and depth.
It ensures that seeds get covered by the soil after sowing.

This protects seeds from being eaten by birds. Sowing by using a seed drill saves time and labor.

24
Q

I am the glucose for your soil, you do not feed, it dies. Who am I?

A

Manure and Fertilizer

25
Q

Continuous cultivation of crops

makes the soil _______ in nutrients.

A

poor

26
Q

How to replenish the unfertile soil?

A

farmers have to add manure to the fields to replenish the soil with nutrients.
This process is called manuring.

Improper or insufficient manuring results in weak plants

27
Q

The farmers dump me in the field allow me to decompose. What Am I?

A

Manure is an organic substance
obtained from the decomposition of
plant or animal wastes.

28
Q

You know me I’m bad for you. Yet you use me. What am I?

A

Fertilizers are chemicals that are rich in a particular nutrient. Fertilizers have also become a source of water pollution.

29
Q

What happens to the soil due to continuous cultivation?

A

Continuous cultivation of crops
makes the soil poor in nutrients.

Therefore, farmers have to add manure
to the fields to replenish the soil with
nutrients. This process is called
manuring.

Improper or insufficient
manuring results in weak plants.

30
Q

I am an organic substance obtained from the decomposition of plant or animal wastes. What am I?

A

Manure is an organic substance
obtained from the decomposition of
plant or animal wastes.

Farmers dum plant and animal waste in pits at open
places and allow it to decompose.

The decomposition is caused by some
microorganisms

31
Q

I am salt that you can not eat, but I am responsible for the food you eat?
Hint: I help the farmers.

A

Fertilizers are chemicals that are
rich in a particular nutrient.
Fertilizers are produced in factories.

32
Q

I am the type of pollution caused by excess use of Fertilizers. What am I?

A

Fertilizers have also

become a source of water pollution.

33
Q

I rotate a lot, for the food you eat. What am I?

A

Another method of replenishing
the soil with nutrients is through crop
rotation. This can be done by growing
different crops alternately.

34
Q

What are the advantages of Manure?

A

Advantages of Manure : The organic manure is considered better than fertilisers. This is because:

  1. it enhances the water holding capacity of the soil.
  2. it makes the soil porous due to which exchange of
    gases becomes easy.
  3. it increases the number of friendly microbes.
  4. it improves the texture of the soil.
35
Q

Why is water necessary for plants?

A

Water is essential because the germination of seeds does not take place under dry conditions.

36
Q

How do the nutrients travel to every part of the plant?

A

Nutrients dissolved in water are transported to

each part of the plant through Roots.

37
Q

What is irrigation?

A

The supply of water to crops at

regular intervals are called irrigation.

38
Q

What are the various sources of Irrigation?

A

Sources of irrigation: The sources of
water for irrigation are— wells,
tubewells, ponds, lakes, rivers, dams
and canals.

39
Q

What are traditional ways of Irrigation?

A

Cattle or human labor is used in these methods. So these methods are cheaper,
but less efficient.

40
Q

What are the examples of Traditional Irrigation?

A

The various traditional ways are:

i) moat (pulley-system
(ii) chain pump
(iii) dhekli, and
(iv) Rahat

41
Q

I am the plants farmers want to remove. They don’t like me. Who am I?

A

Weeds are called unwanted plants that grow along with the main crop.

42
Q

How to remove weeds?

A

Tilling before sowing of crops helps in
uprooting and killing of weeds, which
may then dry up and get mixed with
the soil.

Weeds are also controlled by using
certain chemicals, called weedicides

43
Q

What is harvesting?

A

The cutting of a crop after it is mature is called harvesting.

Harvesting in our country is either done manually by sickle or by a machine called a harvester.

44
Q

How long does it take for the crop to mature?

A

It usually takes 3 to 4 months for a cereal crop to mature.

45
Q

What is threshing?

A

In the harvested crop, the grain seeds need to be separated from the chaff. This process is called
threshing.

46
Q

What is Winnowing?

A

Farmers with small holdings of land
do the separation of grain and chaff by
winnowing

Science Class 8 (1 decks)

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