What soil layer forms last?

What soil layer has the most humus?

What soil layer is made mostly of clay and minerals?

What layer is made of only partially weathered rock?

What layer contains the basic building block of soil?

What is litter?

Where is litter located?

What are two ways to prevent topsoil erosion?

What are the 5 ingredients of soil?

How can farmers prevent soil exhaustion?

What is the correct order in which the soil horizons form?

How are weathering and erosion different?

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