Across
- 3. This kind of farming farming does not use toxic man-made molecules when growing food.
- 5. The introduction of fertilizer such as ammonium nitrate, greatly increased crop _______.
- 8. Replaced animals in the farm fields
- 9. This has been a staple food for humans since the beginning of time
Down
- 1. There are still some hunter gatherer societies in the world today, specifically the Hadza tribe of______________
- 2. Widely used to grind grains into flour
- 4. The process by which farmers select desirable traits and breed plants or animals to continue generations
- 6. During the Middle Ages in Europe, the invention of _____ led to improved farming hand tools
- 7. Another word for corn.