Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Soil Profile - Biogeography
4,798 plays

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

Unacademy user
thank u so much sir .the courses are very informative n useful .
thank you sir !@!@!@@
This crash course is superb and I am sure you have put a lot of efforts in making this comprehensive course, It is of great help. Thankyou Sir.
Sir gud mrng n hv a nc day......thank u for great job .....very precise n brief summary judgment lessons .....plz update hindi videos .......five star rating
  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

  9. Rate, Review and Recommend !! unacademy . We make lots of efforts in creating theses courses . These courses are absolutely free of cost Overview Lessons Reviews & REVIEWS 4.7 Please Rate, Review and Recommend so 1 ratings-6 reviews that it may benefit others too Help us spread the news! Write a review