Green Onions

1. The amount of empty space in a growing medium that holds air or water.
3. Air spaces in a growing medium that allow roots to access oxygen.
5. The ability of excess water to flow out of a growing system.
6. Compression of a growing medium that reduces air space and root growth.
7. Loss of nutrients due to water passing through a growing medium.
8. A lightweight mineral added to improve drainage and aeration in plant systems.
9. Movement of water across a membrane from low to high solute concentration.
11. Measure of salt concentration affecting plant water uptake.
12. The process of a seed beginning to sprout and grow.
13. Green pigment in leaves that captures sunlight for photosynthesis.
14. The ability of green onions to produce new shoots after harvesting.
16. Relating to bacteria and fungi that live in the root environment and affect plant health.
17. Essential minerals required for plant growth such as nitrogen and potassium.

2. Any material used to support plant roots instead of soil.
4. Combined water loss from soil evaporation and plant transpiration.
6. Water movement through tiny pores in materials like coconut coir.
10. The narrow region of soil or medium directly influenced by roots and microbes.
14. The area where plant roots grow and absorb water and nutrients.
15. Plant tissue where active cell division occurs for growth and regrowth.