Knowra Frost protection Frost protection Frost protection comprises methods used to reduce crop damage during freezing conditions. Methods work by limiting heat loss, adding heat, or changing crop exposure and timing.
Radiation frost : A surface frost caused by radiative heat loss from the ground and plants under clear, calm conditions. Many protective methods target the heat loss that produces this common frost type.
Citrus frost protection : Practices that reduce freezing injury in citrus trees, including irrigation, heating, and canopy management. Citrus orchards use several established methods to protect fruit and evergreen foliage.
Plant freezing injury : Damage to plant cells and tissues caused by freezing temperatures and ice formation. Frost protection aims to prevent or limit this underlying form of crop damage.
Passive frost protection : Frost-risk reduction through site choice, crop selection, and management rather than active heat or water application. It contrasts with emergency measures that consume fuel, electricity, or water during a frost.
Wind machine : A large fan that mixes warmer air above crops with colder air near the ground. It reduces temperature inversions by drawing warmer air down into orchards.
Vineyard frost protection : Practices that reduce frost injury to grapevines, especially newly emerged shoots and buds. Vineyards combine heaters, wind machines, sprinklers, and site selection according to frost conditions.
Ice nucleation : The initiation of ice-crystal formation from liquid water. The temperature at which ice nucleates affects how and when plant tissues freeze.
Active frost protection : Frost control that actively adds heat or mixes air during freezing conditions. This category includes the intervention-based methods used when passive measures are insufficient.
Overhead irrigation : A frost-control method that sprays water over crops, releasing latent heat as the water freezes. Continuous application can keep plant tissues near freezing, but interruption may worsen injury.
Greenhouse heating : The use of heaters and heat-distribution systems to maintain suitable temperatures inside a greenhouse. A greenhouse provides an enclosed setting for active temperature control during freezing weather.
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