Soils - Horizons and Textures Quiz

Which soil horizon is called the Topsoil?

• O

• A

• E

• B

Which soil horizon is called the subsoil?

• O

• A

• R

• B

Which soil horizon do farmers want a good layer of for their plant roots?

• O

• A

• C

• B

Which layer of soil is made of organic material?

• O

• A

• R

• B

Which layer of soil is solid rock?

• E

• B

• C

• R

Which layer of soil is lighter in color because of lost minerals?

• E

• B

• C

• R

The color of the A horizon is most often...

• dark (black)

• white / gray

• red

• yellow

40 % Sand

50% Silt

10% Clay

• Clay

• Clay Loam

• Silt Loam

• Sandy Loam

What percent of the soil is Silt Based on the Texture: SILTY CLAY:

5% SAND

50% CLAY

• 45%

• 38%

• 36%

• 55%

35 % Sand

15% Silt

50% Clay

• Clay Loam

• Sandy Loam

• Silt Loam

• Clay