Agricultural techniques in the Amazon

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Across
  1. 1. Cultivation of crops
  2. 3. Means not all nutrients leached from soil
  3. 4. Farming method involving cutting and burning of trees
  4. 6. Growing one crop in a field at one time
  5. 10. Rearing of animals
  6. 11. Having a range of different crops on land
  7. 12. Allows plants to grow
Down
  1. 2. Where nutrients are removed from the soil
  2. 5. Combining forests and trees
  3. 7. Preparing land and growing crops
  4. 8. Made from charcoal, waste and human manure
  5. 9. Ability of soils to sustain plant growth