1. Frost

2. Nature of frost: During the day the soil absorbs heat and becomes warmer

3. at night the soil, and to a lesser extent the trees, vines and trellis, give off or radiate heat and become colder

11. Wind Machines Mixes warm inversion air with cold air near ground during radiation frost

12. Freeze

13. Freeze Damage in Citrus Trunk Fruit damage Leaf damage

14. Freeze damage on citrus production Complete lost of citrus groves

15. A severely damaged young lime tree

16. Possible freeze damage on a navel orange. Look for yellow spots, which then develop into pitted areas and often rot if warm(ish) wet weather follows.

17. 1386-2009 Mazandaran

18. 1386-2009 Golestan

19. Overhead sprinklers Under tree micro-sprinkler Sprinklers

22. FREEZE PROTECTION METHODS Heaters Soil banking