Across
- 3. A way of growing crops without having to disturb the soil before planting.
- 9. Impermeable clay layer below soil traps water inundating root systems
- 12. Cultivating fish in a controlled environment and harvesting them in captivity.
- 17. Only allow recreational use, such as camping and hiking.The National Park System and National Wilderness Areas are an example of this
- 18. Generates enough crops and livestock to feed a family and provide income.
- 22. Allow logging, hunting, mining, and grazing. The National Wildlife Refuges is an example of this.
- 24. Chemicals that kill roundworms
- 25. Turning a degraded ecosystem back into a functional ecosystem.
- 29. A cultivation method in which different crops are planted in alternating strips in order to prevent erosion.
- 31. Growing crops on levels of flat areas resembling steps.
- 32. Produces enough crops and livestock for a family’s survival.
- 33. Increase in the salt content of soil because of irrigation.
- 34. Removal of thin layers of soil by water and other forces of nature
- 35. Kills insects
Down
- 1. A strategy for pest control that uses a combination of various techniques to reduce the need for pesticides.
- 2. Two or more different crops grown at the same time in a plot.
- 4. Soil is removed in considerable depth after a large rainfall.
- 5. Growing crops perpendicular to a slope
- 6. Planting different plants together.
- 7. When plots of land are planted with different varities of the same crop.
- 8. Agricultural method in which crops and trees are grown together.
- 10. Used large amounts of water, fertilizers, pesticides and water to increase crop yields in developed countries in the 1950s-1970s
- 11. Chemicals that kill weeds
- 13. Removal of soil in which water picks up speed and creates small streams.
- 14. Chemicals used to kill mice and rats
- 15. Used to designate lands that may be used for purposes such recreation, logging, mining, farming. The National Forests and National Resource Lands are examples of this.
- 16. An organism, whose genome has been modified to produce superior traits.
- 19. Open country used for animals to graze
- 20. Taking in 100-400 calories less than needed to maintain body weight
- 21. Introduced dwarf rice and other specifically bred crops in developing countries to increase crop yield.
- 23. Freshwater worldwide is mainly used for
- 26. Areas of undeveloped land that are primarily affected by the forces of nature rather than by man.
- 27. Act that regulates the sale of pesticides in the United States
- 28. Fish are held for a few years, released, and then harvested when they return to spawn.
- 30. Deficiency of key nutrients