NTA-NET (UGC-NET) Geography (80) Bio-Geography-Soil Structure and Formation Study Material (Page 5 of 10)

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Soil Characteristics: Soil Depth

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Soil Depth

Depth of a soil is important for both agricultural crop selection and non-agricultural uses:

  • Deeply rooted plants such as trees require deep soils for best growth.
  • Coarse gravel and sand layers obstruct root penetration and can endure high water tables.
  • Houses having basements or septic tanks should be made on deep, well-drained soils.

Causes of Shallow Depth

Depth of a soil can be shallow because

  • Soil formation made only a thin layer of soil on very hard or resistant parent material.
  • Erosion reduced the thickness of a once-deep soil.
  • Root-…

… (31 more words) …

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Soil Characteristics: Acidity

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Acidity

Degree of acidity of alkalinity (basic nature) of soil is represented by its pH (potential of hydrogen) . Acidic soils have greater availability of hydrogen ions, affecting cation exchange.

PH

pH is a numeric scale used to specify the acidity or basicity of an aqueous solution. pH is decreased by addition of acid to a solution, which increases the concentration of hydrogen ions. pH is not same as acidity, it is the scale on which acidity is expressed.

Classification of Soil

Soil having

  • is acidic
  • is neutral

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