Class 8 Crop Production And Management CBSE Questions & Answers

Class 8 · Crop Production And Management

This is Science Class 8 Crop Production and Management CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Weeds compete with crop plants for :
  • A
    all of these
    Correct
  • B
    sunlight
  • C
    minerals
  • D
    water
2
A common weed is :
  • A
    Dhaincha
  • B
    Amaranthus
    Correct
  • C
    Crotolaria
  • D
    Azadirichta
3
Soil can be loosened with the help of a :
  • A
    sickle
  • B
    plough
    Correct
  • C
    combine
  • D
    thresher
4
Paddy crop is grown in rainy season because :
  • A
    it needs more water
    Correct
  • B
    needs frogs for dispersal of seeds and spores
  • C
    needs a microbe that grows along with crop in rainy season only
  • D
    it needs waterlogging which is possible in rains
5
Roots of plants can breathe easily in loose soil since:
  • A
    microorganisms help to trap air in loose soil only
  • B
    loose soil traps fresh air produced by plants growing in it
  • C
    lot of air remains trapped in loose soil
    Correct
  • D
    plants growing in loose soil have better exchange through aerial parts
6
Water logging can reduce soil fertility by :
  • A
    decreasing fertiliser content of soil
  • B
    creating new salts in soil
  • C
    decreasing salts in soil
  • D
    increasing salts in soil
    Correct
7
Which of the following can never belong to category of plant pests ?
  • A
    rodents
  • B
    insects
  • C
    birds
  • D
    leeches
    Correct
8
Animals that provide us with milk are commonly called:
  • A
    diary animals
  • B
    milking animals
  • C
    dairy animals
    Correct
  • D
    lactic animals
9
A tractor will be helpful in :
  • A
    killing the pests
  • B
    irrigating the field
  • C
    tilling the field
    Correct
  • D
    harvesting the field
10
Read the following statements:i. Cross breeding is a method for crop improvementii. Self-breeding is called hybridization.
  • A
    both are wrong
  • B
    both are correct
  • C
    Statement i) is wrong and ii) is correct
  • D
    Statement ii) is wrong and i) is correct
    Correct
11
In the field during fallow period :
  • A
    crops are not grown
    Correct
  • B
    only kharif crops are grown
  • C
    only Rabi crops are grown
  • D
    fibre crops are grown
12
If new plants are grown from stem or root of parent plant then it will be :
  • A
    vegetational development
  • B
    artificial growth
  • C
    vegetative propagation
    Correct
  • D
    fertilisation
13
Rainwater collected in check dams :
  • A
    increases ground water level
    Correct
  • B
    decreases fertility of soil
  • C
    supplies water to urban areas
  • D
    decreases rains in the area
14
_____ have natural ability to make soil fertile:
  • A
    beans
    Correct
  • B
    banana
  • C
    spinach
  • D
    wheat
15
Nitrogen is essential for plant growth and its usable form for plants is:
  • A
    liquid nitrogen
  • B
    nitrogen gas
  • C
    ammonia
  • D
    nitrates
    Correct