Soil Science

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Soil Science

• Springville, Utah

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• Where does soil come from?
• Rocks
• Minerals
• Organic Matter

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Sagebrush-Cold Desert
Mollisol Profile
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What are the main components of soil?

• Mineral Matter
• Air
• Water
• Organic Matter

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Soil Particles
Note clays are microscopic in size !
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Clay minerals photographed with an
electron Microscope. Note they are plate or
flake like and are stacked on top of each
other. They are electrically charged and act
like magnets that attract and hold
plant nutrients.
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Soil should have aggregates!
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Organic matter is soil gold !
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What causes soil erosion? Water Wind No
Vegetation
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My Neighbor has my soil!
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Rain drop erosion
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The Great Dust Bowl Wind Erosion
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The Great Dust Bowl
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Clouds of Silt
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Wind Erosion removed topsoil
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Wind eroded soil
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Rill Erosion
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Gully Erosion
How did the Canyon Lands of Utah form?
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Vegetation protects soil
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Erosion Prayer
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Our lives depend on preserving our topsoils.
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Cotton in Furrows
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What are the FACTORS that make SOIL? TIME 1000S
TO 10,000S OF YEARS LAY OF THE
LAND TOPOGRAPHY LIVING ORGANISMS ANIMALS AND
PLANTS CLIMATE HOT/COLD, WIND/RAIN PARENT
MATERIAL ROCKS AND MINERALS
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Topography
Physical land features
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What are some practices Of SOIL
CONSERVATION? Terracing Strip Cropping Contour
Plowing Tilling Wind Breaks Ground Covers
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Strip Cropping
Contour Plowing
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Contour Farming
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Contour Farming
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Tilling Soil on flat land
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Furrow Irrigation
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Minimum Tillage
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Strip Cropping
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Strip Crop Farming
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Soil - We cannot live without it!
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Give a hand to the land
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Internet Sites

• http//www.tx.nrcs.usda.gov/class/sammy.htm