Topics 4, 5, 6 Review

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Across
  1. 2. growing plants without the use of soil
  2. 4. only planting one type of plant in a field
  3. 6. most successful weed
  4. 9. growing food and fibre while keeping natural systems healthy
  5. 10. machine used to prepare and fertilize soil
  6. 11. machine used to harvest grain and separate seed
  7. 14. an organism that causes nplants to die or produce less than normal
  8. 15. machine used to cut the hay
  9. 17. means to water crops
  10. 18. means soil that is blown away by wind and water
  11. 20. yellow crop used to make cooking oil and salad dressing
Down
  1. 1. pollutants move through levels f a food chain
  2. 3. a mushroom is an example
  3. 5. rows of trees farmers plant along edges of fields
  4. 7. dark rich portion of the soil
  5. 8. salt crust collected on the surface of soil
  6. 12. the top food crop in Alberta
  7. 13. a decomposer that grind, digest and mix soil
  8. 16. nitrogen, phosphorous and potassium are the main ingredients
  9. 19. food grown without the use of chemicals