soil

1234567891011121314151617181920
Across
  1. 2. / a heavy, water logged soil
  2. 7. / when nutrients are washed out of soil
  3. 8. / how flat or mountainous an area is
  4. 9. / also known as subsoil
  5. 10. Rock / main component of soil
  6. 11. / takes 400 years to form 1 cm of soil.
  7. 13. / manmade watering of plants
  8. 14. / an impermeable layer of leached nutrients in soil
  9. 15. / also known as topsoil
  10. 18. / sticky dark substance high in nutrients
  11. 19. / provides nitrogen and oxygen for soil
  12. 20. / acidic soils in areas of conifer forest
Down
  1. 1. / soils with little nutrients
  2. 3. / break down plant matter to form humus
  3. 4. / makes up 25% of soil, dissolves minerals
  4. 5. / heavy rain and cold weather can break down rocks
  5. 6. / a type of soil found in bogs
  6. 12. / creatures which burrow in soil
  7. 16. / surface layer of dead plant litter and animals
  8. 17. / also known as bedrock or parent material