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Soil Test - 2

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Soil Test - 2
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following types of soil covers the northern plains of India?
    Solution
    Alluvial soil covers the northern plains of India.
  • Question 2
    1 / -0
    Which of the following untreated waste products causes soil pollution?
    Solution
    Chemical discharge leads to increase in soil pollution.
  • Question 3
    1 / -0
    Which of the following pollutants kill the organisms living in the soil?
    Solution
    Plastics are responsible for killing organisms in the soil.
  • Question 4
    1 / -0
    Humus is made up of _______.
    Solution

    Humus is composed of decayed plants and animals.

  • Question 5
    1 / -0
    Which of the following processes is involved in the formation of soil?
    Solution
    Weathering is the breakdown of rocks at the Earth's surface, by the action of rainwater, extremes of temperature, and biological activity. . Weathering results in the formation of soil.
  • Question 6
    1 / -0
    Which one component does not help in breaking down of rocks to form soil?
    Solution
    Vegetation does not help in breaking down of rocks to form soil. Major weathering is carried out by physical agents like wind, temperature and water.
  • Question 7
    1 / -0
    On which factors nature of any soil does not depends?
    Solution
    Animals inhabiting an area do not determine the type of soil in the area.
  • Question 8
    1 / -0
    What is soil profile?
    Solution
    A soil horizon makes up a distinct layer of soil. The soil profile is a vertical section of the soil that depicts all of its horizons.
  • Question 9
    1 / -0
    What is the different layers observed through a section of the soil known as?
    Solution

    The different layers observed through a section of the soil are referred to as horizons.

  • Question 10
    1 / -0
    Which layer of soil is favorable for plant growth?
    Solution
    Topsoil is the most fertile layer of soil . It is most suitable for growing crops.
  • Question 11
    1 / -0
    Fertility of soil is increased by presence of __________.
    Solution
    Humus is the organic component of soil, formed by the decomposition of leaves and other plant material by soil microorganisms. It increases the fertility of soil.
  • Question 12
    1 / -0
    Pick out the odd one.
    Solution
    Frog play no role in improving soil texture. Other three options, help in improving soil texture.
  • Question 13
    1 / -0
    Which one of the following layers is the hardest layer of soil?
    Solution
    Bedrock is the hard area of rock in the ground that holds up the loose soil above. It is the hardest layer.
  • Question 14
    1 / -0
    In which layer of the soil no humus is present?
    Solution
    The C horizon is relatively unaffected by the processes of soil formation. In this layer, no humus is found
  • Question 15
    1 / -0
    Which two qualities are possessed by A - horizon of the soil?
    Solution
    A horizon is a weathered layer that contains an accumulation of humus (decomposed, dark-coloured, carbon-rich matter) and microbial biomass that is mixed with small-grained minerals to form aggregate structures.This layer is soft and porous.
  • Question 16
    1 / -0
    In which layer of soil, mineral content is observed to be higher as compare to humus?
    Solution
    B - Horizon is rich in mineral content as compared to humus.
  • Question 17
    1 / -0
    The uppermost horizon is dark in colour because
    Solution
    The uppermost horizon is generally dark in colour as it is rich in humus and minerals. The humus makes the soil fertile and provides nutrients to growing plants.
  • Question 18
    1 / -0
    What is the end product formed of the weathering of rocks?
    Solution
    Sand and clay are the end products of weathering.
  • Question 19
    1 / -0
    What is the mixture of rock particles and humus?
    Solution
    Soil is a mixture of different rock particles and humus.
  • Question 20
    1 / -0
    Boojho collected a soil sample from his garden. It was containing higher proportion of big soil particles. Which type of soil is it?
    Solution
    The soil is classified on the basis of the proportion of particles of various sizes. If soil contains greater proportion of big particles, it is called sandy soil. If the proportion of fine particles is relatively higher, then it is called clayey soil. If the amount of large and fine particles is about the same, then the soil is called loamy.
  • Question 21
    1 / -0
    To improve the capacity to hold water _______ is added to the soil.
    Solution

    Option 1
    To improve the capacity to hold water, humus is added to the soil. Compost is high in humus as a result of decomposition of organic matter. Humus will improve the properties of soil and thus its ability to hold water.

  • Question 22
    1 / -0
    Which component in the soil helps the plants in respiration?
    Solution
    During respiration, plants utilise oxygen and give out carbon dioxide. Oxygen is obtained from air.
  • Question 23
    1 / -0
    Which of the following types of soil particles is/are present in greater proportion in the loamy soil?
    Solution
    Loamy soil is a mixture of sand, clay and another type of soil particle known as silt.
  • Question 24
    1 / -0
    In which type of soil, particles are light and having large spaces between them?
    Solution

    Option 2
    Sandy soil is made of greater proportion of big particles like sand. They cannot fit closely together. So, there are large spaces between them. These places are filled with air. Therefore, in this type of soil, water absorption is very high as the water passes quickly through these spaces. These soils are light, well aerated and dry.

  • Question 25
    1 / -0
    __________ soil have good water holding capacity and provide poor aeration.
    Solution

    Option 3
    Clayey soil had good water-holding capacity and provides poor aeration. It is made of a relatively higher proportion of fine particles. Unlike sandy soils, these soils have very less space between particles. Because the particles are smaller in size, water can be trapped in the tiny gaps between them. Clay soils are heavy and hold more water.

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