Question

The ........................ layer of the Earth is topsoil
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Answer 1

Answer:

The uppermost horizon is called the topsoil layer. The topsoil layer is a mixture of sand, silt, clay and broken down organic matter, called humus. Humus is rich, highly decomposed organic matter mostly made from dead plants, crunched-up leaves, dead insects and twigs.

Explanation:

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Answer 2

Answer:

The crust layer of the Earth is topsoil