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Exam #3 Review - Coggle Diagram
Exam #3 Review
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CH 11: Soils
Dust Bowl
caused by drought and poor farming practices that removed protective plant cover, leading to massive top soil erosion
Soil Horizons
O-Organic matter -> fresh & decay
A-(top soil) -> where plants grow
E- (leached layers)-> washed out by rain
B- (Subsoil)-> clay & minerals
C- (Parent material)-> broken rock
R- Bedrock
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5 Soil Farming Factor
1. Parent material-> original rock or sediment
- Climate -> temp or precipitation
- Organisms-> living things
- Topography-> structure of land
- Time-> amplifies all factors
Soil composition: made of mineral particles (sand, silt, clay) organic matter
Soil Issues and causes
erosion, salinization, over cultivation, deforestation and poor irrigation practices
CAUSED BY-> overgrazing, over cultivation and deforestation
Keita Project-> Soil restoration effort in Niger that caused dams, tree planting and erosion control
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