dirt
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Dirt. What’s the difference?. Soil. Soil – The outermost thin layer of the earth’s surface capable of supporting life. All of life comes from the soil. Without it, we would perish. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Dirt](https://reader035.vdocuments.mx/reader035/viewer/2022062501/5681622e550346895dd25b88/html5/thumbnails/1.jpg)
![Page 2: Dirt](https://reader035.vdocuments.mx/reader035/viewer/2022062501/5681622e550346895dd25b88/html5/thumbnails/2.jpg)
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• What’s the difference?
Dirt
![Page 4: Dirt](https://reader035.vdocuments.mx/reader035/viewer/2022062501/5681622e550346895dd25b88/html5/thumbnails/4.jpg)
Soil• Soil – The outermost thin layer of the earth’s
surface capable of supporting life.
• All of life comes from the soil. Without it, we would perish.
• Soil takes many centuries to form and is so durable it can last as long as our species survives, yet it is so fragile it can be destroyed almost overnight.
![Page 5: Dirt](https://reader035.vdocuments.mx/reader035/viewer/2022062501/5681622e550346895dd25b88/html5/thumbnails/5.jpg)
• How do we have soil ?
![Page 6: Dirt](https://reader035.vdocuments.mx/reader035/viewer/2022062501/5681622e550346895dd25b88/html5/thumbnails/6.jpg)
• Time-------------------------->
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Soil Forming Factors• Parent Material plus Soil Organic Matter• Weathering Factors–Temperature changes–Water Action–Plant roots–Ice Expansion–Mechanical grinding
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• A Horizon
• B Horizon
• C Horizon
Soil Horizons
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• Most Soils have three major horizons with an optional organic (O) layer
• The Surface (A)
• The subsoil (B)
• The substatum (C)
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• Darker
• 2-5” deep
• Organic matter
A Horizon
![Page 11: Dirt](https://reader035.vdocuments.mx/reader035/viewer/2022062501/5681622e550346895dd25b88/html5/thumbnails/11.jpg)
• Transition between A (topsoil) and C (bedrock)
• Called “Subsoil”
B Horizon
![Page 12: Dirt](https://reader035.vdocuments.mx/reader035/viewer/2022062501/5681622e550346895dd25b88/html5/thumbnails/12.jpg)
• Parent material
• Close to Bedrock
• Little change
C horizon
![Page 13: Dirt](https://reader035.vdocuments.mx/reader035/viewer/2022062501/5681622e550346895dd25b88/html5/thumbnails/13.jpg)
• After soil’s broken down, do we have different types or all the same type of soil?
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Soil
•Sand
•Silt
•Clay
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– Sand- few large pores = __low__ water holding capacity.• The particle size is from 0.05-2.0 mm
Textural Class: Sand
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– Silt- many medium pores = ___high__ water holing capacity• Particles from .002-.05 mm
Textural Class: Silt
![Page 17: Dirt](https://reader035.vdocuments.mx/reader035/viewer/2022062501/5681622e550346895dd25b88/html5/thumbnails/17.jpg)
–Clay- lots of ___fine__ pores = high water holding capacity• Particle size <.002
Textural Class: Clay
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• Sand 0.05-2mm
• Silt 0.02-0.05mm
• Clay <0.02
Particle Size