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GES 175, The Science of Soils

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GES 175, The Science of Soils Lecture 1, Introduction Soil Profile Development SOIL COMPONENTS Major Components representative, medium-textured surface soil (by ... – PowerPoint PPT presentation

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Title: GES 175, The Science of Soils


1
GES 175, The Science of Soils
Lecture 1, Introduction
2
CA State Soil
San Joaquin Series
3
A Tour of Soil Types
4
Soils of the Mid-West
Mollisol
5
Soils of the Everglades
Spodosol
6
Soils of the North East and North West
Spodosol
7
Soils of the Tropics
Oxisol
8
Soils from Wetlands
Histosol
9
Soils from Recent Landscapes
Inceptisol
10
Soils Near Recent Volcanic Activity
Andisols
11
Course Objectives
  • To comprehend the physical, chemical, and
    biological processes functioning within soils
  • To define factors influencing elemental
    (contaminant and nutrient) cycling within
    terrestrial ecosystems
  • To obtain an appreciation for soils as dynamic,
    non-renewable natural resources
  • To learn the appropriate use of the terms soil
    and dirt

12
Perceptions of Soil
Agriculture
Science
Environment
13
Soil Development
14
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15
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16
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17
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18
Soil Profile Development
?
19
The Beginning
20
  • Soil Profile Development
  • contains characteristic layers called horizons

Bedrock
21
Soil Forming Factors
  • Time
  • Parent Material
  • Climate
  • Biota
  • Topography

22
What Defines a Soil?
dynamic natural bodies having properties
derived from the combined effects of climate and
biotic activities, as modified by topography,
acting on parent material over periods of time
The difference between Soil and Dirt?
23
Soil Ecosystem
Soil is a living entity that is continually
undergoing development dirt is stagnant remnants
of organic and mineral matter
24
SOIL COMPONENTS
25
Major Components
  • representative, medium-textured surface soil (by
    volume)

26
Major Components
  • representative, medium-textured surface soil (by
    volume)

27
Major Components
  • representative, medium-textured surface soil (by
    volume)
  • for optimum plant growth

28
Soil Organisms
29
Soil Minerals
30
Soil Chemistry
31
Soil Color Originates from the Molecular
Framework
32
Unique and Important Properties of Soils
33
Soil Natures Filter and Storage Bank
Fine, mixed, active, thermic Abruptic Durixeralfs
34
Retention within Soils
Fertilizer
Soils act as a storage bank for plant
nutrients retain water filter contaminants
Nitrogen, Phosphorus, Potassium...
H2O
35
Retention within Soils
Cr
Cr
H2O
36
Consequences of Misuse
37
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38
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39
Transformation of Waterbodies
40
Acid Mine Drainage
41
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42
Result of Acid Mine Drainage
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