The middle layer of the soil

This layer is poor in mulch, but it has many nutrients, that is, substances that can be used as food for animals and plants. These nutrients are filtered from the top layer. In the middle layer there are pieces of rocks and tree roots.

Bibliography: Intermediate layer of soil. Microsoft® Encarta® 2009 [DVD]. Microsoft Corporation, 2008.

The middle layer of the soil
Source: curiosities  
June 18, 2019

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