Across
- 1. A scale that measures the relative acidity or alkalinity of a solution
- 4. A popular growing medium for hydroponic growers
- 5. Hieroglyphic records show water garden dating back hundreds of years
- 6. Uses 10 times less than traditional field crops Provide support for plants in water
- 8. A plant that completes its life cycle in less than one year
- 11. The process of converting carbon dioxide into oxygen in the presence of sunlight
- 12. The period after planting, when a seed first grows
Down
- 2. Production of plants in water without a soil medium
- 3. System that uses net cups on a floating raft
- 7. The major elements that plants must have in large amounts
- 9. Necessity for optimal plant growth
- 10. System that uses pvc pipe and a pump to move water