Across
- 2. Provides shade in a GH, lowers temperature
- 3. What is the 2nd hardest environmental factor in a GH?
- 5. Type of gas that is contained in HID lamps and thermometers
- 9. What is the 1st hardest environmental factor to control in a GH?
- 10. One element needed for photosynthesis to occur
- 14. Type of lamps used in a GH to increase plant growth
- 17. Type of light that affects heat reactions in plants
- 18. The relative temperature that is suitable for plant growth
- 20. type pf nutrients needed for photosynthesis (O, H, and C)
- 21. Nitrogen, phosphorous and potassium
- 23. Water loss which occurs at the leaves
- 25. the measure of the intensity of light in a GH
- 26. What is the atmosphere made mostly of? (78%)
- 28. Controls amoun of GH light
- 29. Yellowing of leaves caused by poor nutrition or poor drainage
- 30. chemical that targets plant pests
- 32. High temperatures cause flower colors to ________
- 34. The type of light to use to extend day length
- 35. Added to city drinking water but can be harmful to plants
Down
- 1. The period of time each day during which a plant receives light
- 4. Controls GH temperature
- 6. Occurs in all living things 24/day
- 7. Weed killers;valuable in reducing weeds in crops
- 8. Type of light that causes chemical reactions in plants
- 11. Carbon dioxide, water and sunlight are needed for this to occur
- 12. Sulfur,Calcium and Magnesium
- 13. Sun burn for plants
- 15. Types of light bulbs that are expensive but most effecient light output
- 16. Controls GH humidity
- 19. When light intensity is low, plants begin to bend or elongate
- 22. What is our soil mostly made of? (45%)
- 24. Type of gas that comes from ripening of animal manure
- 27. Warm days, cool nights is referred to as a _________ DIF
- 31. Type of gas that is harmful to plants; caused by decaying organic matter
- 33. Help to break down dead and decaying material in soil for plants