geography :P

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Across
  1. 2. Controlled farming of marine life in water
  2. 4. The business of agriculture
  3. 5. produce that has been grown without the assistance of artificial products
  4. 7. The fraction of light that a surface reflects
  5. 8. only occurring within an area (plant or animal)
Down
  1. 1. The ability to maintain or support a process over time
  2. 3. land plowed but not seeded for at least one growing season
  3. 6. a method of farming which involves growing crops on terraces built into the sides of hills or mountains