Geology; Rocks Soil Formation Soil Deposits Soil Mineralogy Soil Structure Engineering
Soil
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Transcript of Soil
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Soil
All you wanted to know but were too afraid to ask……
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This is a soil profile
• It shows the different layers (called horizons) of soil as you go deeper.
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The type of soil in an area affects the types of plants that can grow there
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Canada has many different soil regions
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What type of soil is best for agriculture?
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Sandy Soil
Not good for agriculture• Water and minerals drain
quickly• Therefore plants cannot get
enough water and minerals• Sandy soil is:
– Lighter in colour– Feels like sand– You cannot form it into a ball
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Clayey Soil
Not good for agriculture• Better then sandy soil but,• Small/few air pockets so
roots get little oxygen• Compacts easily making it
hard for roots to grow• Clayey soil:
– Feels sticky– You can form it into a ball
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What Makes Good Agricultural Soil?
Not too much clay, not too much sand, not too much silt = LOAM
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What Makes Good Agricultural Soil?
Good Agricultural soil is…• LOAM = a bit of sand, clay and
silt– Holds enough water and minerals– Good amount of air pockets
(oxygen)• Dark in colour = Lots of
decomposing organic matter– This means lots of nutrients
• Full of decomposers like worms– They eat organic matter and their
poo has the nutrients plants need.
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Worms!