pussle on ls-soil

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Across
  1. 3. the completely dissolved product of plant and animal matter
  2. 4. the top most layer of the earth
Down
  1. 1. braking down of rock to smaller pieces by natural forces
  2. 2. mixture of sand, silt, clay and humus also known as the best soil for plant growth
  3. 4. derived from a the parent rock from which soil is formed