Across
- 2. abbrev for pest control that uses a variety of methods rather than relying on harsh chemicals
- 5. percentages of sand, silt and clay contained in a soil sample
- 6. The ability of a particular soil to absorb and release cations
- 9. removal of soil particles by wind, water and gravity
- 12. amount of empty space in a volume of soil
- 14. mostly made of parent material
- 16. The arrangement of horizons in a soil
- 17. planting seed by drilling them into the soil through a layer of crop waste from the previous year
- 18. type of irrigation that conserves the most water
- 19. growing more than one crop in the same field at the same time
- 20. also known as subsoil, very little organic matter
Down
- 1. cation toxic to plants, high concentrations at low pH
- 3. rate at which water and air flow through soil
- 4. The proportion of soil bases to soil acids, expressed as a percentage
- 7. growing crops under a canopy of trees
- 8. topsoil, organic material and minerals have been mixed together
- 10. breakdown of rocks by physical and chemical means
- 11. anion that aids in flower and fruit production
- 13. the limiting nutrient in most soils
- 15. layer of organic material on the surface of topsoil