Soils: Biotic Material and Soil Formation
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Questions and Answers

What is necessary to turn powdery material into soil?

  • Mixing biotic material into it (correct)
  • Exposing it to sunlight
  • Sprinkling water on it
  • Adding chemical fertilizers
  • What is the name of the biotic material produced from the decomposition of remains of plants and animals in the soil?

  • Vermicompost
  • Organic waste
  • Humus (correct)
  • Compost
  • What is essential for the process of producing vermicompost or compost?

  • Direct sunlight
  • Chemical pesticides
  • Synthetic fertilizers
  • Organic waste, water, heat (correct)
  • Why does the proportion of humus in the soil affect its fertility?

    <p>Humus provides essential nutrients to plants</p> Signup and view all the answers

    How long does it take to form a 2.5 cm thick layer of topsoil?

    <p>Thousands of years</p> Signup and view all the answers

    In which type of region does the process of soil formation occur faster?

    <p>Regions with high rainfall and higher temperatures</p> Signup and view all the answers

    What are the main factors influencing soil formation?

    <p>Parent rock, climate, and biotic material</p> Signup and view all the answers

    What does weathering of the rock depend on?

    <p>Climate and intensity of weathering</p> Signup and view all the answers

    What does basalt rock turn into after weathering in the Deccan Plateau?

    <p>Black soil</p> Signup and view all the answers

    What gives rise to red soil in South India?

    <p>Granite or gneiss rocks</p> Signup and view all the answers

    What are the constituents of soil according to the text?

    <p>Partially or completely decomposed organic material, powdered form of weathered rock, microorganisms</p> Signup and view all the answers

    What is an important component of the living world on earth according to the text?

    <p>Plants</p> Signup and view all the answers

    What do plants get from the soils for their growth?

    <p>Nutrients required for their growth</p> Signup and view all the answers

    What is used by a farmer as an ecosystem?

    <p>Soil</p> Signup and view all the answers

    What are used profusely for getting higher agricultural production?

    <p>Different types of chemical fertilizers, insecticides</p> Signup and view all the answers

    What is referred to as 'regur' soil?

    <p>Black soil in the Deccan Plateau</p> Signup and view all the answers

    The powdery material from the weathering of rocks is considered soil.

    <p>False</p> Signup and view all the answers

    The decomposition of remains of plants and animals contributes to the formation of humus in the soil.

    <p>True</p> Signup and view all the answers

    Soils become more fertile if the proportion of humus in the soil is greater.

    <p>True</p> Signup and view all the answers

    Vermicompost production requires elements like organic waste, water, and heat.

    <p>True</p> Signup and view all the answers

    Soil formation is a rapid process that occurs over a short period of time.

    <p>False</p> Signup and view all the answers

    The process of soil formation occurs faster in regions with high rainfall and higher temperatures.

    <p>True</p> Signup and view all the answers

    Soil formation takes less time in regions with low temperatures and low rainfall.

    <p>False</p> Signup and view all the answers

    Soil is mainly used for industrial purposes.

    <p>False</p> Signup and view all the answers

    Chemical fertilizers and insecticides lead to the improvement of soils.

    <p>False</p> Signup and view all the answers

    The parent rock is not an important factor in soil formation.

    <p>False</p> Signup and view all the answers

    The climate of the region does not influence soil formation.

    <p>False</p> Signup and view all the answers

    Weathering of the rock does not depend on the climate of the region.

    <p>False</p> Signup and view all the answers

    Soil does not contain decomposed organic material.

    <p>False</p> Signup and view all the answers

    Soil is not a complete ecosystem.

    <p>False</p> Signup and view all the answers

    Plants do not get nutrients required for their growth from the soils.

    <p>False</p> Signup and view all the answers

    'Earth' means soil.

    <p>False</p> Signup and view all the answers

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