Soil Science. Soil Science Where does soil come from? Rocks Minerals Organic Matter.

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Presentation transcript:

Soil Science

Where does soil come from? Rocks Minerals Organic Matter

What are the main components of soil? Mineral Matter Air Water Organic Matter

Soil Particles Note: clays are microscopic in size !

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.

Organic matter is soil gold !

What causes soil erosion? Water Wind No Vegetation

Rain drop erosion

The Great Dust Bowl Wind Erosion

The Great Dust Bowl

Clouds of Silt

Wind Erosion removed topsoil

Vegetation protects soil

Our lives depend on preserving our topsoils.

What are the FACTORS that make SOIL? TIME LAY OF THE LAND 1000’S TO 10,000’S OF YEARS LAY OF THE LAND TOPOGRAPHY LIVING ORGANISMS ANIMALS AND PLANTS CLIMATE HOT/COLD, WIND/RAIN PARENT MATERIAL ROCKS AND MINERALS

SOIL CONSERVATION? Terracing Strip Cropping Contour Plowing Tilling What are some practices Of SOIL CONSERVATION? Terracing Strip Cropping Contour Plowing Tilling Wind Breaks Ground Covers

Strip Cropping Contour Plowing

Contour Farming

Contour Farming

Strip Cropping

Strip Crop Farming

Soil - We cannot live without it!

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