Across
- 2. to protect against loss such as soil from erosion
- 5. taking turns growing a crop on a field
- 7. using trees or other plants to block the wind and protect topsoil
- 8. peas and beans with nitrogen fixing bacteria
- 10. soil with a high H ion concentration
- 12. leaving leftover crops to avoid tilling
- 13. richness of nutrients in the soil
- 16. kill too many plants, can compact soil and lead to erosion
- 17. does not have to be replanted every year
- 19. plowing along parallel lines on a hill
- 20. ability to dissolve in water
Down
- 1. organisms that return nutrients to the soil
- 3. most commonly known as potassium, calcium, carbon, phosphorus and nitrogen
- 4. most fertile area of a soil profile
- 6. to maintain soil fertility long into the future
- 9. calcium carbonate rock that serves as a base for soil
- 11. growing to crops at one time
- 14. rotate livestock to different pastures
- 15. cutting of flat platforms on steep hills to reduce erosion
- 18. color given to a manure that is also known as a cover crop, left on field