Soil crossword

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Across
  1. 4. Soil in this area comes from the slow build-up of alluvium at a low elevation
  2. 6. A thick, reddish soil that has lots of nutrients and is often used to make bricks and pottery
  3. 7. Soil in this area comes from a slow build-up of alluvium at a medium elevation
Down
  1. 1. A mix of clay, sand, silt, and gravel carried somewhere by a river or stream
  2. 2. Soil in this area is rich in minerals and is good for agriculture and pasture-based farming
  3. 3. Soil in this area comes from decomposed rocks and minerals
  4. 5. Soil in this area is full of water and organic matter and, for that reason, is not good for agriculture. It is also called "bog soil."