Soil Science Chapter 1: Soil as a Natural Body
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Questions and Answers

What is the main focus of pedology as mentioned in the text?

  • Analyzing the composition of rocks and minerals
  • Studying the soil as a medium of plant growth
  • Studying the process of soil formation and methods of soil survey (correct)
  • Investigating the physical, chemical and biological soil properties
  • What is the source of sedimentary and metamorphic rocks according to the text?

  • Cooling and crystallization of magma
  • Molten magma
  • Formation of igneous rocks (correct)
  • Weathering of the rocks
  • What percentage of the soil solid constitutes the parent material formed from the weathering of rocks?

  • 55%
  • 45% (correct)
  • 65%
  • 35%
  • What does edaphology intend to study according to the text?

    <p>Soil as a medium of plant growth</p> Signup and view all the answers

    According to the text, what will happen if the soil is abused?

    <p>The soil will collapse and die, taking humanity with it</p> Signup and view all the answers

    In which domain of soil science study are methods of soil survey, mapping, and classification the main focus?

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

    Who is known as the 'Father of Soil Science'?

    <p>V.V. Dokuchaev</p> Signup and view all the answers

    What did the Russian team led by Dokuchaev report in 1870 that marked the beginning of the science of pedology?

    <p>Distinct horizontal layers in soils associated with climate, vegetation, and underlying soil material</p> Signup and view all the answers

    Who published the 'Great Soil Groups of the World' in German in 1914?

    <p>K.D. Glinka</p> Signup and view all the answers

    When was the book 'Great Soil Groups of the World' translated from German to English by C.F. Marbut?

    <p>1927</p> Signup and view all the answers

    What did V.V. Dokuchaev establish soil as, distinguishing it from undifferentiated weathered rocks?

    <p>A distinct natural body with a definite genesis and a distinct nature of its own</p> Signup and view all the answers

    What is a pedon considered as?

    <p>A hypothetical soil body having minimum volume of soil to be observable</p> Signup and view all the answers

    What did the Russian team led by Dokuchaev associate distinct horizontal layers in soils with?

    <p>Different combinations of climate, vegetation, and underlying soil material</p> Signup and view all the answers

    'Soil Taxonomy' is now an acceptable scientific system of what?

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

    'Great Soil Groups of the World' was published by which member of the Russian team?

    <p>K.D. Glinka</p> Signup and view all the answers

    'Pedological Research in India' made a modest beginning in which century?

    <p>'20th century'</p> Signup and view all the answers

    The composition of the rocks depends upon the type of minerals present in it. Weathering of the rocks results in to formation of ______ material which constitutes about 45% volume of soil solid.

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

    In edaphology, we intend to study the soil as a medium of plant growth, therefore, all physical, chemical and biological soil properties are of ______.

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

    The domain of soil science study could be broadly divided into two groups: ______ and edaphology.

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

    Cooling and crystallization of this magma led to the formation of ______ rocks which is a source of sedimentary and metamorphic rocks.

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

    However, in ______, main focus is to study about the process of soil formation, rocks and minerals, their weathering, soil forming factors and methods of soil survey, mapping and classification.

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

    Abuse it and the soil will collapse and die, taking humanity with it.” – Vedas Sanskrit scripture1500 BC 3.1. Introduction The domain of soil science study could be broadly divided into two groups: ______ and edaphology.

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

    The parent material is the state of soil system at the time zero of soil ______.

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

    Soil formation proceeds further by the combined interaction of soil forming factors and soil forming ______.

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

    Soil forming factors set the stage for the operation of processes of soil formation and have the influence on properties of the ______.

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

    V.V. Dokuchaev, known as ‘Father of Soil Science’, was the first to establish soil as a distinct natural body having a definite genesis and a distinct nature of its ______.

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

    Soil is a highly heterogeneous body thus always difficult to be grouped in to different ______.

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

    Various classification systems have been prevalent during past but the ‘Soil Taxonomy’ is now an acceptable scientific system of soil ______.

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

    A brilliant Russian team of soil scientists led by Dokuchaev (1870) reported unique horizontal layers in soils which were associated with different combinations of climate, vegetation and underlying soil ______.

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

    The Russian studies began as early as 1870, they were known to only few scientists outside Russia until 1914, when “Great Soil Groups of the World” was published in German by K.D. Glinka, a member of the Russian ______.

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

    Pedological research in India had made a modest beginning in the later part of 20th century which was mainly focused on ______.

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

    His work did not receive due attention of the West European and American workers until the book of Russian scholar – Glinka (Great Soil Groups of the World) was translated from German to English by C.F. Marbut in the year ______.

    <p>1927</p> Signup and view all the answers

    Study Notes

    Pedology and Soil Science

    • Pedology focuses on the study of soil formation, processes, and classification.
    • Associated distinct horizontal layers in soils are influenced by climate, vegetation, and underlying rock.
    • V.V. Dokuchaev established soil as a distinct natural body with a definite genesis and nature, distinguishing it from undifferentiated weathered rocks.
    • A pedon is considered a three-dimensional unit of soil that is large enough to represent the properties of a specific soil group.

    Geological Sources

    • Sedimentary and metamorphic rocks originate from the weathering of existing rocks and magma.
    • Cooling and crystallization of magma lead to the formation of igneous rocks, sources of sedimentary and metamorphic rocks.

    Soil Composition

    • Parent material constitutes about 45% of the soil solid formed from the weathering of rocks.
    • The composition of soil influences its physical, chemical, and biological properties.

    Edaphology

    • Edaphology studies soil as a medium for plant growth, emphasizing physical, chemical, and biological properties.
    • Soil formation involves factors that interact to shape soil properties.

    Soil Classification and Research

    • Soil science is divided into two main domains: pedology and edaphology.
    • 'Soil Taxonomy' is an accepted scientific classification system for soil.
    • Various classification systems have evolved, with current methodologies focusing on soil survey, mapping, and classification.

    Key Historical Figures

    • V.V. Dokuchaev is known as the 'Father of Soil Science'.
    • In 1870, a Russian team led by Dokuchaev reported horizontal soil layers, marking the beginning of pedology.
    • K.D. Glinka published "Great Soil Groups of the World" in German in 1914; it was later translated to English by C.F. Marbut.

    Environmental Impact

    • Soil abuse can lead to its degradation, referred to in Vedic scripture as causing collapse and danger to humanity’s survival.

    Milestones in Indian Research

    • Pedological research in India started modestly in the late 20th century, primarily focusing on local soil studies and management.

    Final Notes

    • The state of soil at the onset of its formation is termed parent material.
    • Soil forming factors influence both the processes of soil formation and the resulting soil properties.

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    Description

    Test your knowledge of soil science with this quiz covering the concepts of soil as a natural body, pedological and edaphological ideas, soil genesis, soil forming rocks and minerals, weathering processes, and factors of soil formation.

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