Unit 22 Review Questions

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. The solum:

is another term for pedon correct incorrect

consists of the A and B horizons only correct incorrect

consists of the O and A horizons only correct incorrect

consists of the O, A, B, and C horizons correct incorrect

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. The higher the percentage of this type of soil particle, the greater the soil permeability:

clay correct incorrect

silt correct incorrect

sand correct incorrect

loam correct incorrect

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. Which soil will have the highest field capacity?

Silty clay correct incorrect

Silt loam correct incorrect

Sandy clay correct incorrect

Loam correct incorrect

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. Over the long term in humid regions, soils tend to become:

more acidic and more fertile correct incorrect

more acidic and less fertile correct incorrect

less acidic and more fertile correct incorrect

less acidic and less fertile correct incorrect

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. In a soil catena, sandy soil is typically found:

at the highest elevation correct incorrect

bordering stream valleys correct incorrect

on steep slopes just below the high point correct incorrect

just uphill of clay soil correct incorrect

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. The source of humus in soil is:

chemical weathering correct incorrect

physical weathering correct incorrect

decomposition of organic matter correct incorrect

breakdown of bedrock correct incorrect