SOILS

SOILS

1. WEATHERING

   • The breaking of rocks into smaller rocks either by a physical or a chemical process

2. EROSION

   • When these smaller rocks are carried away from the bigger parent rocks, usually by wind or water

3. Depending on the size of the weathered rock

   • CLAY smallest 0.002mm
   • SILT between 0.05mm
   • SAND biggest 2.0mm
     • Depending of this the soil will have different properties

4. Different horizons in soil

5. Soil is divided into:

   • ORDER
     • SUBORDER
       • GREAT GROUP
         • SUB GROUP
           • FAMILY
             • SERIES

6. CLORPT

   • CLimate: rainfall, temperature and humidity
   • Organism
   • Relief: change in elevation
   • Parent material
   • Time
   • It is used to remember the factors that influence soil

7. SOIL ORDERS

   • ENTISOL
     • No development of the soil horizons
     • Most common on Earth
     • Very young
   • INCEPTISOL
     • Slightly more horizon development
     • GELISOL
       • High altitude (Artic or mountain ranges)
       • Permafrost
       • Little horizon developmente
     • SPODOSOL
       • Near to the Equator
       • Coniferous and boreal forest
       • Acidic due to pine needles
       • Low fertility
     • ALFISOL
       • rich in iron and aluminion
       • Broadleaf and deciduous forest
     • ULTISOL
       • Subtropical and humid
       • Rich in iron
         • Makes it red
     • ARIDISOL
       • Clay particles blown away by the wind leaving mostly heavier sand, silt and gravel
       • Desert soil
         • Not sad like a desert
     • MOLLISOL
       • Darker soils
       • More fertile
         • Best for agriculture
       • Grassland regions
     • OXISOL
       • Low soil fertilty
       • Very developed horizons, but hard to see
       • A lot of iron
       • Rainforest soils
     • ANDISOL
       • Volcanic soil
       • Rich in nutrients
       • Beatiful landscapes
     • HISTOSOL
       • Wetland soils
       • usually contain peat and other organic matter
       • Highly acidic
       • Unstable and dangerous to build structures
     • VERTISOL
       • Highly clay content
       • Dry out regulary
       • Agrietate

8. Soil in danger

   • Forest and plants protect soil
     • But forests are cut down and soil is used for farming
   • Cities are growing
   • We "put soil at the end of our list " because we think, both the soil and the food it produce, will stay forever

9. Positive side

   • We know what to do to take care of it
     • 1) Take care of soil
     • 2) the soil right must be safeguard by the law
     • 3) Not turned our hole neighborhood of asfalt

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