User:Leigh4280/sandbox

An effective low cost method used in some small crop farms and plant nurseries, exploits a property of water known as latent heat of fusion. By use of a pulsed irrigation timer, existing overhead sprinklers may be used to deliver water at a low average precipitation rate ranging from 2.5 to 5ml/Hour for frosts down to -5deg. C. As the water is deposited on the foliage it freezes, giving off its latent heat and preventing the temperature of the foliage falling below zero.