Permeability

1. What is humus and how does it get added to soils?
2. Define the following terms:
   Permeability:
   Porosity:
3. Explain the consequences of reduced soil permeability and aeration if a soil is compacted?
4. Explain what the color of a soil can tell us?
   Online lab revised 2020
5. List the 5 soil-forming factors and explain how each contributes to soil formation:
   Soil forming factor Influence on development & evolution of soil
6. List at least four critical functions of soil. In other words, why is soil such an important resource?
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7. List at least four human activities that degrade or destroy soil:
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   Online lab revised 2020
8. Plot the following soil textures on the triangle using colored pencils and designate each soil
   texture. (Tip: watch the how to use a soil texture triangle video posted in Canvas).
   A. 70 % sand, 20 % silt and 10 % clay
   B. 30 % sand, 60 % silt and 10 % clay
   C. 30 % sand, 40 % silt and 30 % clay
   D. 25 % sand, 15 % silt and 65 % clay

Sample Solution