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Questions and Answers
Which soil horizon is known for containing the most essential nutrients for plant growth?
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?
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?
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?
What is the primary characteristic of the E-Horizon in soil?
Which soil horizon represents the least weathered layer of the soil profile?
Which soil horizon represents the least weathered layer of the soil profile?
Flashcards
O Horizon
O Horizon
The top layer of soil made of decayed humus.
A Horizon
A Horizon
Topsoil layer rich in organic material essential for plant growth.
E Horizon
E Horizon
Layer characterized by leaching where minerals are removed from soil.
B Horizon
B Horizon
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Zone of Leaching
Zone of Leaching
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Zone of Accumulation
Zone of Accumulation
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Importance of Topsoil
Importance of Topsoil
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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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