Across
- 1. an area located between the mountains and coastal plain in North Carolina
- 2. multiple crop species
- 6. general term for area for growing crops
- 11. the process of a flower being fertilized
- 12. a form of conservation where level platforms are cut into steep hillsides
- 18. the total fertility rate that maintains a stable population size
- 21. detrioration of soil quality and productivity
- 24. large-scale mechanization of agriculture that uses fossil fuels
- 25. storehouse for samples of seed from various crops
- 27. soil can be composed of sand, silt, and _________
- 28. a cross section of a soil profile
- 30. soil that you sweep up in the house
- 32. a complex plant supporting system composed of weather rock, organic matter air, nutrients, and water
- 33. a single crop species
- 34. the number of people within a given area
- 36. agriculture that uses human and animal power along with simple tools
- 37. people leaving one area for another
- 40. insects that help pollinate flowers
- 41. saturation of the soil with water
- 42. an example of extreme soil erosion in late 1800s to early 1900s in the United States
Down
- 1. a scientist that wrote about the earth reaching carrying capacity
- 3. the maximum population size of a given organism that a given environment can sustain
- 4. the practice of rotating different agronomic species
- 5. ageneral detrioration in land that diminishes productivity and biodiversity
- 7. a social science that applies the principles of population ecology to changes in human populations
- 8. artificial provision of water to support agriculture
- 9. the process by which soil is formed
- 10. an environmental factor that is used to characterize a biome
- 13. a disorder that is harmfuld to bee populations
- 14. an easy method for determining how many years it will take for a population to double
- 15. a diversity of DNA traits of plants and animals that may prove useful in survival
- 16. buildup of salts in the soil
- 17. practice of cultivating soil, producing crops, and raising livestock for human use and consumption
- 18. general term for area for producing animals
- 19. the number of people
- 20. the overuse of an area of rangland for animal production
- 22. a simple model that is used to relate the impact on the environment from population, affluence, and technology
- 23. agriculture that can be practiced in the same way into the future
- 26. the removal of soil from one place and its transport to another by wind or water
- 29. the movement of individuals between populations of organisms
- 31. a form of conservation where land is plowed perpendicular to a slope or follows the natural contour of the land
- 35. species that are typically at the bottom of a food chain or pyramid
- 38. a type of fertilizer mined or synthetically manufactured
- 39. minerals that support plant growth