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Soil Profile - Biogeography
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In this lesson Bhanwar explains soil horizon which constitue soil profile and soil formation (pedogenesis) process.

Bhanwar Singh
Ex- National Defence Academy (115 Course) Cleared Civil Services Examination, 2012

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sir mene apke all mcq ke vedio ko dekha h and previous year ke paper solve kiya h to kya me 2018 prelims de sakti hu please guide sir
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  1. CRASH COURSE-WORLD GEOGRAPHY Presented by - Bhanwar Singh Sirohi


  3. ABOUT ME BA. (Hons) in Law from Awadh University I Defence Academy (115 Course) Cleared Civil Services Examination, 2012 Hobbies - Writing Poetry Course Fee Contribute Follow me on Unacademy at:

  4. FACTORS RESPONSIBLE There are certain factors which influences the soil formation, which are Parent Rock Climate Biotic Activity Topography Time Apart from these, two processes are important ELUVIATION-Downward transport process ILLUVIATION-Accumulation of matter in Underlying zone

  5. SOIL PROFILE The soil profile is the vertical arrangement of horizons down to the parent rock material The horizon is the distinguishable layer in the soil that has distinctive physical and chemical composition, organic content, structure or a combination of such properties True Soil: Characterised by distinct horizons and the capability to support plants Pedon: It is the soil column extending down from the surface and reaches regolith or bedrock Poly pedon: It is the smallest distinctive division of the soil of a given area

  6. HORIZONS O-HORIZON: Surface horizon which comprises organic material. It is most A-HORIZON: Surface horizon which consists of minerals and significant prominent in frosted areas amounts of organic material. It is predominantly surface layer of many soils in agricultural land and grasslands E-HORIZON: Sub-surface horizon which has been heavily leached and is typically light in colour B-HORIZON: Sub-surface horizon accumulated from the layers above and is site of deposition of leached minerals C-HORIZON: Sub-surface horizon which is least weathered. It is also known as Saprolite and is unconsolidated loose parent material

  7. Horizons o 2" 10 48

  8. PEDOGENESIS TRANSLOCATION-It involves several kinds of physical movements which are mainly in the downward direction. It may include Leaching, Eluviation, Illuviation, Calcification, Salinisation or Alkanisation ORGANIC CHANGES-lt occur mainly on the surface where degradation of organic material causes humification PODZOLISATION OR CHELUVIATION-It occurs in cool, humid climatic areas where bacterial activity is low GLEYING-It takes place in water logged and anaerobic conditions DESILICATION OR LATERISATION-It occurs commonly in hot-wet tropical and equatorial climates

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