| 1. | The fossil record of Alfisols begins in the Late Devonian.
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| 2. | Fossil Alfisols remain common from the Carboniferous and all periods since the Eocene.
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| 3. | Alfisols form in semiarid to humid areas, typically under a hardwood forest cover.
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| 4. | They can be easily exhausted, and require more careful management than alfisols or mollisols.
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| 5. | Alfer became the root term for Alfisols.
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| 6. | Alfisols occupy around one-tenth of the Earth's ice-free land surface.
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| 7. | Alfisols have undergone only moderate leaching.
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| 8. | Alfisols are also present in these areas and contain a medium to high supply of nutrients.
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| 9. | Within its native range it will often grow on soils of Inceptisols, Ultisols, and Alfisols groups.
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| 10. | Four soil orders are found in the upstream river basin viz . ultisols, alfisols, inceptisols and entisols.
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