Slide 2: Soil Science Slide 4: Soil is “the unconsolidated mineral or material on the immediate surface of the earth that serves as a natural medium for the growth of land plants.”
• Soil is “the unconsolidated mineral or organic matter
on the surface of the earth that has been subjected to
and influenced by genetic and environmental factors
of parent material, climate (including water and
temperature effects), macro- and microorganisms, and
topography, all acting over a period of time and
producing a product—soil—that differs from the
material from which it is derived in many physical,
chemical, biological, and morphological properties
and characteristics.” Slide 5: Soil as an open system Slide 6: Where does soil come from?
Organic Matter Slide 13: Mollisol Profile Sagebrush-Cold Desert What are the main components of soil? : What are the main components of soil? Mineral Matter
Organic Matter Slide 17: Soil Particles Note: clays are microscopic in size ! Slide 19: Clay minerals
with an electron
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. Slide 20: Soil should have aggregates! Slide 21: Organic matter is soil gold ! Slide 22: What causes soil erosion?
No Vegetation Slide 23: My Neighbor has my soil! Slide 24: Rain drop erosion Slide 25: The Great Dust Bowl
Wind Erosion Slide 26: The Great Dust Bowl Slide 27: Clouds of Silt Slide 28: Wind Erosion removed topsoil Slide 29: Wind eroded soil Slide 30: Rill Erosion Slide 31: Gully Erosion How did the Canyon Lands
of Utah form? Slide 32: Vegetation protects soil Slide 33: Erosion Prayer Slide 35: Our lives depend on preserving our topsoils. Slide 37: Cotton in Furrows Slide 38: What are the FACTORS
that make SOIL?
1000’S TO 10,000’S OF YEARS
LAY OF THE LAND
ANIMALS AND PLANTS
ROCKS AND MINERALS Slide 39: Topography Physical land features Slide 40: What are some practices
Ground Covers Slide 43: Strip Cropping Contour Plowing Slide 44: Contour Farming Slide 45: Contour Farming Slide 46: Tilling Soil on flat land Slide 47: Furrow Irrigation Slide 48: Minimum Tillage Slide 49: Strip Cropping Slide 50: Strip Crop Farming Slide 51: Soil - We cannot live without it!