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