True/False
Indicate whether the sentence or statement is true or
false.
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| 1. | A rise or fall of our four feet
in 50 feet is equal to an eight percent slope.
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| 2. | Glacial lake deposits are most
common in northwest Ohio.
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| 3. | Alluvial deposits are
transported, sorted, and deposited by water.
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| 4. | Most soils formed in lacustrine
sediments are considered to be on uplands.
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| 5. | The presence of sand and/or
gravel in the substratum of soils is an indication of a terrace landform.
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| 6. | Firm glacial till is virtually
free of roots except along seams or widely spaced weak structural breaks.
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| 7. | Fragipans commonly have
granular structure.
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| 8. | Clay is sticky and plastic when
moist and cannot be seen under an ordinary microscope.
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| 9. | The gray streaks in the
yellowish brown or brown glacial till substratum of well drained and moderately well drained soils
are not mottles.
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| 10. | A terrace is a relict flood
plain which is now above the level of modern flooding.
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| 11. | Fragipans commonly occur
immediately under the plow layer or at 7-to-10-inch depth.
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| 12. | Subsidence is a property
associated with a high shrink-swell potential.
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| 13. | The common types of soil
structure are chunks and clods.
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| 14. | A clayey texture can contain
various amounts of rock fragments.
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| 15. | A septic tank absorption field
placed in a soil with mottling at 27 inches should have a drainage system designed and implemented to
effectively lower the seasonal high water table.
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| 16. | Depressions occur on some
terraces.
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| 17. | The land surface of foot slopes
is usually concave.
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| 18. | Gravel is the largest of the
primary soil particles.
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| 19. | Soils containing a high
percentage of sand are called loamy.
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| 20. | In moist soil, macropores
account for more air movement than micropores.
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