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Entisols
Ent ~ Recent
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Characteristics
• Soils of recent development • Highly resistant parent materials• The exposed land surface is young, due to
erosion • Typical Profile: A, C, or A, Bw, C (Bw is not
cambic due to being too sandy)
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Typical Environments
• Found in largely diverse land settings• Steep rocky settings• Large river valleys• Most extensive of the soil orders• 18% of Earth’s ice free land area• 12.3% of U.S. land area
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Inceptisols
Inceptum ~ Beginning
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Characteristics
• Immature soils, but show more development than Entisols
• Altered horizons, but not weathered enough to become illuvial horizons
• Supports about 20% of the world’s pop.
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Characteristics cont.
• Diagnostic features: ochric, epipedon, and cambic horizon. Typical sequence: A, Bw, C.
• 15% of Earth’s ice free land area• 9.7% U.S. land area
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Typical Environment
• Widely distributed across a wide range of ecological settings
• Steep slopes, young geomorphic surfaces, on resistant parent materials
• Excluded from areas with permafrost• Not found in arid regions.
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