由这些颗粒物质组成的地层很常见，通常位于土壤下方看不见的位置。

Beds of this material, out of sight beneath the soil, are common.

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土壤细颗粒的损失对土壤有效钾影响最大。

The loss of fine soil has the most sensitive impact on available potassium.

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土壤细颗粒的损失对土壤有效钾影响最大。

The loss of fine soil has the most sensitive impact on available potassium.

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