Frost Protection

Overhead irrigation system havc been used successfully to protect crops during radiation frosts*. The Emitters create a thin layer of water above the canopy. The water freezes and the latent heat (80 calories per 1 gram of water that freezes), released during the freezing process of the water protect the crop by keeping its temperature above freezing.

*Radiation frost (hoar frost) occurs on clear nights with little or no wind when the outgoing radiation is excessive and the air temperature is not necessarily at the freezing point.

Frost protection in vineyards (Portugal)


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