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Soil Horizons Quiz

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Questions and Answers

Which soil horizon is known for containing the most essential nutrients for plant growth?

E-Horizon

B-Horizon

A-Horizon (correct)

O-Horizon

What is the primary process responsible for the formation of the different soil horizons?

Compaction by gravity

Deposition of sediments

Erosion by wind and water

Weathering and leaching (correct)

What is the significance of the O-Horizon in soil development?

It is the layer where most soil organisms live

It provides a base for the formation of rocks

It is the primary source of minerals for plants

It is a rich source of decayed organic matter providing nutrients (correct)

What is the primary characteristic of the E-Horizon in soil?

<p>Loss of nutrients and minerals due to leaching (B)</p> Signup and view all the answers

Which soil horizon represents the least weathered layer of the soil profile?

<p>R-Horizon (D)</p> Signup and view all the answers

Flashcards

O Horizon

The top layer of soil made of decayed humus.

A Horizon

Topsoil layer rich in organic material essential for plant growth.

E Horizon

Layer characterized by leaching where minerals are removed from soil.

B Horizon

Accumulation zone where minerals and nutrients gather.

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Zone of Leaching

Layer where minerals are washed away, often found in the E Horizon.

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Zone of Accumulation

Layer where dissolved minerals and nutrients gather, located in the B Horizon.

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Importance of Topsoil

The A Horizon is crucial for plant growth, providing essential nutrients.

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Study Notes

Soil Horizons

Soil is made of layers called horizons.
The top layer is called the topsoil.
The decaying layer beneath topsoil is 'humus'.
The layer beneath 'humus' is 'topsoil' which has 'soil'
The layer beneath that also has 'soil'.
Below that is the 'bedrock'.
'Rock' fragments are found in lower levels of soil.
'Dust Bowl' refers to a period of drought in the US.
'Dust Bowl' conditions are not conducive for healthy soil.

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Description

Test your knowledge on the different layers of soil, known as horizons. This quiz will cover the characteristics and functions of each layer, including topsoil, humus, and bedrock, as well as historical events like the Dust Bowl. Challenge yourself to understand the importance of each horizon in maintaining healthy soil.