Name: 
 

2006 Ohio District 7 Urban Soils Test



True/False
Indicate whether the sentence or statement is true or false.
 

 1. 

The most precise way to measure slope is with a clinometer.
 

 2. 

Uplands, terraces, and depressions make up the three general classes of landscapes.
 

 3. 

Slippage or Subsidence is a severe land use limitation for lawns, gardens and landscaping.
 

 4. 

Muck and peat soils have extremely low water-holding capacity, very high soils strength and highly unstable when dry.
 

 5. 

Clay will form a ball when pressed between the fingers but will not form a ribbon that holds together.
 

 6. 

Surface soil texture refers to the texture of the normal plow layer or the upper 10 inches of top soil.
 

 7. 

A uniformly bright-colored soil is a sign of a soil that is well drained to excessively drained and does not have a seasonal high water table within 48 inches of the surface.
 

 8. 

In mottled soils, the shorter the duration of saturation, the less extensive the gray color.
 

 9. 

Bedrock greater than 60 inches below the soil surface is not considered a soil limitation for basements and septic tank absorption fields.
 

 10. 

Fragipans and dense glacial till can limit the function of septic tank absorption fields.
 

 11. 

A good sit for buildings with basements is in nearly-level or gently-sloping soils with clayey subsoil textures.
 

 12. 

A septic tank absorption field should be located within 50 feet of a stream or other body of water.
 

 13. 

Clayey surface soil textures are good for roads and streets because they are considered “heavy soils.”
 

 14. 

Shallow-rooted trees should be selected for landscapes with a hard dense soil layer within a depth of 40 inches.
 

 15. 

Sand, silt, and clay material deposited on land by streams is known as alluvium.
 

 16. 

A perimeter (curtain) drain is required around some septic tank absorption field to carry the excess effluent away.
 

 17. 

A moderately sloping soil is considered to be a 12-18% slope.
 

 18. 

Slopes greater than 6% can create erosion hazards that might cause driveways to wash out or become covered with sediment or debris.
 

 19. 

Gray streaks found in the substratum of soils formed in glacial till and lakebed sediments are known as mottles.
 

 20. 

A loamy soil texture consists mostly of silt particles.
 



 
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