Agriculture and Forestry Crossword

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Across
  1. 4. The removal of trees in a series of cuts over a 10-30 year period
  2. 6. Pesticides Man-made pesticide
  3. 10. Dark coloured layer with large amounts of organic matter and minerals
  4. 11. The removal of most of all trees from a chosen area
  5. 12. Nitrogen, Potassium and Phosphorus absorbed by plant roots
  6. 14. The practice of growing different crops at different times on the same land
  7. 15. Materials that do not break down and stay in the environment for years
  8. 16. Contains no organic matter, layer that determines the soil pH
  9. 18. Practice of developing and managing forests for timber products
  10. 21. The planting of two of more plant species close together so that some benefit occurs
  11. 23. The practice of growing and raising plants or livestock for food and other human needs
  12. 24. Contains less organic matter and fewer organisms and accumulates nutrients leached from topsoil
Down
  1. 1. Farming of freshwater and saltwater organisms
  2. 2. Material produced when micro-organisms in soil break down organic matter in the presence of oxygen
  3. 3. pH less than 7
  4. 5. Depletion of forests
  5. 6. Made of nitrogen, phosphorus and potassium to put nutrients back into soil
  6. 7. A mixture of mineral grains, air, water, and organic material that supports plant life
  7. 8. Animals raised and grown without growth hormones
  8. 9. The confining animals to a small area of pasture for a short time before shifting them to a new location
  9. 13. Main agent of soil erosion
  10. 15. Solid layer of rock
  11. 17. Cutting Cutting and removing mature trees individually or in small clusters ever 10-20 years
  12. 19. Soil that provides the best conditions for plant growth
  13. 20. The growth of a single crop on a large area of land
  14. 22. A property of soil that describes the size and number of spaces found among soil
  15. 25. pH greater than 7