Soil Individual Pedon Quiz

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What is the major source of nutrient elements in soil?

Water

Pore spaces

Organic matter

Solid mineral matter (correct)

Which component of soil occupies the pore spaces and provides oxygen for root respiration?

Solid mineral matter

Air (correct)

Organic matter

Water

What is the main function of organic matter in soil?

To indicate nitrogen status of soil

To promote the formation of aggregates (correct)

To provide oxygen for plant respiration

To carry nutrients to the proximity of roots

Which component of soil is needed by plants in large amounts for their metabolic functions?

Water Signup and view all the answers

What is the composition of air in the pore spaces of the soil?

Mainly oxygen Signup and view all the answers

What is the basic sampling unit in soil surveys?

Pedon Signup and view all the answers

Which soil horizon is characterized by being leached of clay, minerals, and organic matter?

E horizon Signup and view all the answers

What is the layer in soil called that is mostly organic matter like decomposing leaves?

O horizon Signup and view all the answers

What does a polypedon consist of?

Multiple pedons Signup and view all the answers

Which part of the soil profile is rich in minerals that leached (moved down) from the A or E horizons?

B horizon Signup and view all the answers

What is the mass of rock at Earth’s surface from which the soil developed called?

Parent material Signup and view all the answers

What is soil primarily composed of?

Both organic and inorganic materials Signup and view all the answers

Which of the following is NOT a soil property?

Soil as a natural body Signup and view all the answers

What farming practice is considered destructive to soil fertility?

Slash and burn Signup and view all the answers

Which factor does NOT condition the properties of soil?

Wind speed Signup and view all the answers

What is the function of soil in relation to plant growth?

Provides nutrients, physical support, and water to plants Signup and view all the answers

Which of the following is part of the field of study of Soil Science?

Examining soil composition and properties Signup and view all the answers

What is the soil separate with a diameter range of 2-0.05 mm and a 'course gritty' characteristic feel?

Sand Signup and view all the answers

Which soil separate has a 'smooth powdery' characteristic feel and a diameter range of 0.05-0.002 mm?

Silt Signup and view all the answers

What is the main mineral source found in the sand soil separate?

Quartz Signup and view all the answers

Which soil property refers to the space within the soil that is not occupied by solid particles?

Porosity Signup and view all the answers

What is the term used for the availability of water in the soil under various conditions?

Soil moisture tension Signup and view all the answers

What is the result of hydration on minerals?

Rapid attachment or association with mineral's structure Signup and view all the answers

In oxidation, what happens to the iron in minerals?

It reduces in size and increases in valency Signup and view all the answers

What is carbonation in soil formation?

Reaction with carbonic acid to produce a more soluble product Signup and view all the answers

Which factor affects the shape or contour of the land surface?

Topography Signup and view all the answers

What is the role of steep slopes in soil formation?

Prevention of erosion and runoff Signup and view all the answers

How do sedimentary or residual parent materials form soil?

Developed in place from rocks below where they are found Signup and view all the answers