Soils Quiz Review

Label the three sections of the texture triangle.

a

b

c

Sand

Clay

Silt

Which of the following is not a micronutrient needed in soil?

• Sodium

• Calcium

• Zinc

• Iron

What is the purpose of a buffer pH?

• To determine how much lime is needed in soil

• To determine the amount of nitrogen in the soil

• To determine the percent of organic matter

• To determine how acidic the soil is

When doing a soil test, soil with more _____ won't usually form a ball.

Match the soil pH levels.

• Less than 7.0 pH

• Acidic

• More than 7.0 pH

• Alkaline/Basic

• 7.0 pH

• Neutral

A loam soil is typically ___ percent clay, ___ percent silt, and ___ percent sand.

If a soil ribbon is well over ​ (a)   inches, it indicates a ​ (b)   soil.

• two
• clay
• three
• four
• one
• silt
• sand

Match the description to the type of soil.

• Sand

• Large particles

• Clay

• Becomes sticky when wet

• Silt

• Smooth with a rough ribbon

Which of the following is not a macronutrient needed in soil?

• Nitrogen

• Phosphorous

• Potassium

• Manganese

Soil is made up of four basic components, ​ (a)   , ​ (b)   , ​ ​ (c)   and ​ (d)   ​.

• air
• organic matter
• minerals
• water
• sand
• silt
• clay
• dirt
• oxygen
• nitrogen