1. Soil Science

2. A zone of plant growth

3. FIVE SOIL FORMING FACTORS
Soil parent material- Geologic factor
Climate
Organisms, including vegetation and fauna or soil biota
Topography
Time

8. Runoff and erosion

10. Where does soil come from?
Rocks
Minerals
Organic Matter

11. Bedrock geology is the hard rock or ledge, it ranges anywhere from at the surface to more than 300 feet below the surface.

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

18. Soil Particles
Note: clays are microscopic in size !

20. 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.

21. Organic matter is soil gold !

27. It is common in forests

28. Darker color (decomposed organic matter), courser in texture.
Lost of fine minerals by eluviation. Seed germinate mostly here.

29. Lighter in color

31. A collecting zone for clay, iron, and aluminum removed from above

33. Regolith, beyond the reach of plant roots. No organic matter.

36. What causes soil erosion?
Water
Wind
No Vegetation

37. My Neighbor has my soil!

38. Rain drop erosion

39. The Great Dust Bowl
Wind Erosion

40. The Great Dust Bowl

41. Clouds of Silt

42. Wind Erosion removed topsoil

43. Wind eroded soil

44. Rill Erosion

45. Gully Erosion
How did the Canyon Lands
of Utah form?

46. Vegetation protects soil

47. Erosion Prayer

49. Our lives depend on preserving our topsoils.

51. Cotton in Furrows

52. 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

55. Strip Cropping
Contour Plowing

56. Contour Farming

57. Contour Farming

58. Tilling Soil on flat land

59. Furrow Irrigation

60. Minimum Tillage

61. Strip Cropping

62. Strip Crop Farming

63. Soil - We cannot live without it!

64. Give a hand to the land

65. Internet Sites