Population and agriculture terms

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