Frost

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

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

Wind MachinesMixes warm inversion air with cold air

near ground during radiation frost

Freeze

Freeze Damage in CitrusTrunk Fruit damage

Leaf damage

Freeze damage on citrus production

Complete lost of citrus groves

A severely damaged young lime tree

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.

1386-2009 Mazandaran

1386-2009 Golestan

Overhead sprinklers Under tree micro-sprinkler

Sprinklers

FREEZE PROTECTION METHODS

HeatersSoil banking