Soils CDE Quiz

The universal system used to identify soil color is:

• Hydrometer

• USDA Texture Triangle

• Munsell Color Chart

• Ped

The smallest soil structure size is:

• Sand

• Silt

• Clay

• Very Fine

A stable, natural occurring group of soil particles held together by organic matter, clay minerals, or iron oxides is called:

• Ped

• Structure

• Ribbon Test

• Chroma

The soil test performed in a soil pit to determine the texture is known as:

• Hydrometer

• Ribbon Test

• Munsell Color Chart

• USDA Texture Triangle

The following are common characteristics of the soil in Illinois, EXCEPT?

• Shallow

• Dark in color

• Good for crop production

• High in organic matter

Which particles have the biggest pore spaces?

• Clay

• Silt

• Sand

• None of these

The following are tools used to determine soil texture, EXCEPT?

• USDA Textural Triangle

• Munsell Color Chart

• Ribbon Test

• Hydrometer

What does soil structure affect?

• Infiltration rate

• Aeration

• Drainage

• All of the above

The following are structure shapes, EXCEPT?

• Cubic

• Blocky

• Prismatic

• Platy

The following are all macronutrient supplied by air, EXCEPT?

• Carbon

• Nitrogen

• Hydrogen

• Oxygen