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Soil Texture Classification (page 21)
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60% sand, 0% silt, 40% clay? Sandy Clay
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10% sand, 50% silt, 40% clay? On the border between silty clay and silty clay loam
What is organic matter? (page 25)
These are the items that are soil organic matter:
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Living microbes on a soil surface particle
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Grass blades in an ant mound
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Dung that a dung beetle has brought down to the A horizon
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Worm castings in the soil
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Humus
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Decomposing root fragments in the soil
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An ant
Impacts of Soil Organic Matter on Soils (page 69)
Answers to Activities
and Discussions
Increases Aggregation
Increases Pore space
Increases Water infiltration
Increases Moisture retention
Increases Aeration
Decreases Erodibility