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12 July, 11:06

Which describe the horizons in a soil profile? Check all that apply.

Horizon A is mineral deficient.

Bedrock lies below the soil layers.

Horizon O forms from organic material.

Horizon B undergoes the least amount of change.

Horizon C is least affected by the soil formation process.

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  1. 12 July, 11:18
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    Bedrock lies below the soil layers.

    Horizon O forms from organic material.

    Horizon C is least affected by the soil formation process.

    These are the correct answers.
  2. 12 July, 11:24
    0
    Answer: correct options are Bedrock lies below the soil layers, Horizon O forms from organic material and Horizon C is least affected by the soil formation process.

    Soil profile is a vertical section of the soil that is exposed by digging a hole from the surface of the soil to the underlying bedrock. Most soil profiles are composed of a series of horizons or layers of soil.

    O horizon - fallen leaves and partially decomposed organic matter

    A horizon - A surface mineral horizon, living organisms, and rock particles.

    B horizon - A sub-surface horizon where depletion of organic matter and an accumulation of clay.

    C horizon - A layer of partially altered bedrock

    R horizon - Hard bedrock
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