How Soils are Formed (Grade 11 NSC Matric Geography): Flashcards
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Soil formation rate
Soil formation rate
1 cm every 100-400 years
Why soil is non-renewable
Why soil is non-renewable
Forms too slowly to replace in human lifetime
Four main components of soil
Four main components of soil
Weathered rock, organic matter, water, air
Six factors influencing soil formation
Six factors influencing soil formation
Human activity, parent material, climate, organisms, topography, time
Parent rock
Parent rock
Original rock from which soil develops
Bioturbation
Bioturbation
Organisms moving soil particles & increasing air spaces
Leaching
Leaching
Water moving downward transporting dissolved minerals
Three soil texture categories
Three soil texture categories
Sand, silt, clay particles
Effect of steep slopes on soil
Effect of steep slopes on soil
Thinner, less fertile soils
Climate factors that speed weathering
Climate factors that speed weathering
Higher temperatures & increased rainfall