Presentation Transcript
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?
Rocks
Minerals
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
Air
Water
Organic Matter
Slide 17:Soil Particles Note: clays are microscopic in size !
Slide 19: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.
Slide 20:Soil should have aggregates!
Slide 21:Organic matter is soil gold !
Slide 22:What causes soil erosion?
Water
Wind
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?
TIME
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
Slide 39:Topography Physical land features
Slide 40:What are some practices
Of
SOIL CONSERVATION?
Terracing
Strip Cropping
Contour Plowing
Tilling
Wind Breaks
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!