1 / 10

INTRO TO SOILS – CH 2

INTRO TO SOILS – CH 2. Soil Origin and Development. THE SOIL BODY. Pedon – smallest body which can be called a soil Three-dimensional Typically extends down to depth of plant root. THE SOIL BODY. Polypedon – two or more contiguous pedons Form a Soil Series

karina-fuentes
Télécharger la présentation

INTRO TO SOILS – CH 2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. INTRO TO SOILS – CH 2 Soil Origin and Development

  2. THE SOIL BODY • Pedon – smallest body which can be called a soil • Three-dimensional • Typically extends down to depth of plant root

  3. THE SOIL BODY • Polypedon – two or more contiguous pedons • Form a Soil Series • Soil Series are the lowest official category in the soil taxonomy

  4. THE SOIL BODY • Weathering of rocks and minerals forms pedons • Two types of weathering: • Physical weathering • Chemical weathering Eventually, a layer of young soil develops

  5. THE SOIL BODY • Three types of rock: • Igneous • Sedimentary • Metamorphic

  6. THE SOIL BODY • Five (5) Soil Forming Factors • Parent Material • Climate • Living Organisms (plant and animal) • Topography • Time

  7. THE SOIL PROFILE • Soils change in response to their environment • Four processes of change: • Additions • Losses • Translocations • Transformations

  8. THE SOIL PROFILE • As a soil ages these changes lead to formation of horizontal layers known as: • Soil Horizons These horizons may be exposed when digging into the soil revealing the: • Soil Profile

  9. THE SOIL PROFILE • Master Horizons: • A, B, C • O, A, E, B, C, R Coded layers of horizon with distinct characteristics Not all horizons will always be present!

  10. THE SOIL PROFILE • Subdivisions and Suffixes may further define the master horizons • e.g. AB, Ap, Bt, Bky See Appendix 3 for suffix explanations

More Related