Across
- 2. a method of growing plants in water.
- 5. the process or state of having air, water, or land damaged by harmful substances.
- 6. the practice of supplying land with water.
- 7. not using artificial chemicals in the growing of plants and animals for food and other products.
- 9. land can produce a large number of good quality crops.
Down
- 1. the process by which soil is gradually removed from the surface of the earth.
- 3. the process by which salt accumulates in soil or water.
- 4. the total amount collected of.
- 5. a chemical substance used to kill harmful insects.
- 8. the world on which we live.