Soils

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Across
  1. 1. There are more than one type of it
  2. 3. Organic matter present in soil
  3. 5. The middle layer
  4. 7. The top layer
Down
  1. 2. a soil mixture with high clay content
  2. 4. a person that is highly educated in a subject
  3. 6. The last layer made out of rock