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Getting Dirty with
SOILS
Why Care?
Why Care?
I. Soil Profile
the horizons……
O
A
B
C
R
R
E
Diagnostic properties (B horizon)
• Texture
• Structure
• Color
Texture
•Structure
Diagnostic properties (B horizon)
• Texture
• Structure
• Color
Munsell Color Chart
R
Soils
II. Major Factors Controlling Soil Formation
(from Jenny, 1951)
Soils
II. Major Factors Controlling Soil Formation
(from Jenny, 1951)
A. Climate
Soils
II. Major Factors Controlling Soil Formation
(from Jenny, 1951)
A. Climate
B. Biota
Soils
II. Major Factors Controlling Soil Formation
(from Jenny, 1951)
A. Climate
B. Biota
C. Parent material
Soils
II. Major Factors Controlling Soil Formation
(from Jenny, 1951)
A. Climate
B. Biota
C. Parent material
1. Residual soils vs. Transported soils
Soils
II. Major Factors Controlling Soil Formation
(from Jenny, 1951)
A. Climate
B. Biota
C. Parent material
D. Slope
Soils
II. Major Factors Controlling Soil Formation
(from Jenny, 1951)
A. Climate
B. Biota
C. Parent material
D. Slope
E. Time
III. Major Soil Types
III. Major Soil Types
A. Method: non genetic, based solely on
physical properties
III. Major Soil Types
A. Method: non genetic, based solely on
physical properties
III. Major Soil Types
A. Method: non genetic, based solely on
physical properties
B. Soil Types (Orders)
there are 12 total…..we will examine
some of these.
Soil Orders
Inceptisols
Mollisols
Ultisols
Oxisols
Aridisols
Vertisols
Inceptisol
Found on steep
hillslopes and
floodplains
Ultisols
Common in forested areas
Oxisol
Common in the tropics
Mollisol
Common in prairie environments
Vertisol
Aridisols
IV. Synthesis of Climate, Time, and
Parent Material
V. Soil Fertility
A. Fertilizers
5 – 10 - 5
V. Soil Fertility
A. Fertilizers
5 – 10 – 5
N P K
V. Soil Fertility
A. Fertilizers
Nitrogen
V. Soil Fertility
A. Fertilizers
Nitrogen
* darker, stronger leaves
V. Soil Fertility
A. Fertilizers
Nitrogen
* darker, stronger leaves
* helps with uptake of other nutrients
V. Soil Fertility
A. Fertilizers
Phosphorous
V. Soil Fertility
A. Fertilizers
Phosphorous
* strengthens stems and roots
V. Soil Fertility
A. Fertilizers
Phosphorous
* strengthens stems and roots
* enhances flowering, and seed
production
V. Soil Fertility
A. Fertilizers
Phosphorous
* strengthens stems and roots
* enhances flowering, and seed
production
* increases plant’s resistance to
certain diseases
V. Soil Fertility
A. Fertilizers
Potassium (Potash)
V. Soil Fertility
A. Fertilizers
Potassium (Potash)
* strengthens cell walls and stems
of plants.
V. Soil Fertility
A. Fertilizers
Potassium (Potash)
* strengthens cell walls and stems
of plants.
* helps in plant respiration and
uptake of other minerals.
V. Soil Fertility
A. Fertilizers
B. Organic Matter
V. Soil Fertility
A. Fertilizers
B. Organic Matter
C. Lime
V. Soil Fertility
A. Fertilizers
B. Organic Matter
C. Lime
D. Trace Elements
essential to plants
Fe, Cu, Zn Mg, Mg
VI. Soil Erosion
southern Illinois
~3 ft
high
VI. Soil Erosion
Alexandria
Fredericksburg
Richmond
Petersburg
Emporia
Alexandria
Fredericksburg
Richmond
Petersburg
Emporia
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