True/False
Indicate whether the sentence or statement is true or
false.
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| 1. | Gully erosion channels are
small enough to be covered by common tillage tools.
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| 2. | Clay is the smallest soil
particle.
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| 3. | Soil that has a depth of 20-40
inches is a deep soil.
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| 4. | Imperfectly drained soils
usually have mottles of gray, yellow and brown.
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| 5. | There are 4 texture classes
listed on the Ohio Land and Soil Conservation scorecard.
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| 6. | A claypan is a hard dense layer
in the topsoil.
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| 7. | Strip cropping with contour
tillage should be used on uniform slopes with a range from 6-18%.
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| 8. | Permeability refers to the
ability of the soil to evaporate water.
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| 9. | Loamy Soils contain
clay.
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| 10. | There are some areas in Ohio
were wind erosion can be severe.
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| 11. | Organic matter improves soil
aeration.
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| 12. | Of the three primary soil
particles, sand is the largest with a .002 to .080 inch diameter.
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| 13. | A profile is a cross section of
soil from the surface downward to the parent material.
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| 14. | Dense glacial till is compact
soil material that is tightly bound together and is commonly found in Ohio soils.
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| 15. | No-Till with crop residue
should be used on class VI land.
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| 16. | 3 feet of rise or fall in 50 ft
of horizon distance would be 3% slope.
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| 17. | Coarse sand and gravel is not
considered a root restrictive layer because it has good air and water movement.
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| 18. | Percent of slope is always
measured in the steepest “average” relief of the site.
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| 19. | A fragipan is a loamy subsoil
horizon that is compact and usually shows strong mottling.
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| 20. | Organic matter in the surface
layer of soil tends to break the force of pelting raindrops and prevents the packing of soil and its
consequent erosion.
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| 21. | Soils that contain large stones
or massive bedrock are referred to as heavy soils.
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| 22. | Soil slippage generally occurs
on slopes of less than 12%.
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| 23. | Subsurface or tile drainage
should be installed on ground that has mottling present in the subsoil and a slope of less than 12
percent.
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| 24. | Plants roots require a
favorable balance of air and water for optimal growth.
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| 25. | An intensive cropping practice
should only be used on class one land.
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