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Because freezing is a warming effect. Heat is released as the liquid turns to solid. The water freezes at 0 degrees C (32 deg F), liberating its latent heat, thereby holding the temperature of the surface of the fruit at 0 deg C for a little bit longer than it otherwise would. The juice inside the fruit freezes at less than 0 deg C because of all the stuff dissoved in it. So the water staves off freezing for a few hours, and with any luck the sun comes up and warms things up before the whole orchard freezes. It's also possible to warm up the area with nothing but a fan. Radiation off the surface of the earth is the principle cooling mechanism on a clear night, so the surface air is often much colder than the air just a few meters up. So a big fan can stir up the air, bringing down the warmer air aloft, preventing the fruit at the surface from freezing. None of this works when it's really cold, just when it's a few degrees below freezing for a night or two.

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โˆ™ 2006-04-11 22:45:50
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Q: Why does applying water to an orchard give frost protection?
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Related questions

Is frost an element?

No. Frost is frozen water. Water is a compound.


How are dew and frost similar?

Frost and dew are both water but in different forms; frost is solid water (ice) and dew is liquid water.


Is frost a gas?

No. Frost is ice, which is water in the solid state.


Water vapor turning to frost is an example of?

Water vapor turning to frost is an example ofDEPOSITION


How is heat of fusion used to protect against frost damage?

If an orchard is threatened by frost because of a sharp dip in temperature, we can turn on the sprinklers to warm the orchard. Two things are at work here. First, ground water is going to be cold, but not nearly as cold as air at freezing. Water at 45 degrees will release heat energy into the blooms of the fruit, which are sitting in air at just above freezing. It is not uncommon in orchards to be able to lift the temperature a couple of degrees by turning on the pumps and sprinklers. Water collecting on the blooms might still freeze, but as liquid water changes into solid water (ice), it give up energy to do so. This is the heat of fusion (or standard enthalpy of fusion), and the heat released when water changes state from liquid to solid will "go" somewhere, and the blooms will collect it. This helps stave off frost damage.


Does water contract when it freezes causing frost wedging?

No, frost wedging is caused by water expanding, not contracting.


What is the difference between frost and dew?

Frost is frozen water and dew is not. ...


Which property of water makes frost wedging possible?

Water expands as it freezes is the property of water that makes frost wedging possible. Frost wedging is sharp cornered boulders on bare mountain tops.


In mango orchard the water table is about one and half feet. How it can be manage?

now days the water table of soil is increase. In this land mango orchard is present. how mango can manage this type of soil


What has the author P J O'Gara written?

P. J. O'Gara has written: 'The raspberry cane blight and how to control it' -- subject(s): Raspberries, Diseases and pests 'Water core of apple' -- subject(s): Apples, Diseases and pests 'The prevention of frost injury in the orchards of the Rogue River Valley, Oregon' -- subject(s): Plants, Frost, Effect of temperature on 'The protection of orchards in the Pacific Northwest from spring frosts by means of fires and smudges' -- subject(s): Fruit, Frost protection


What is it called when rocks break because water gets in them and freezes?

frost heaving. Frost heaving.


Why does path lift in the frost?

frost heaves due to water under path freezing and expanding.


What is formed when water vapor near the ground changes into ice?

Air frost - or ground frost


Is frost or ice an element?

No, frost and ice are both forms of water (H2O), which is a compound, not an element.


How does water vapor become frost?

When water vapor meets a surface that is below the freezing temperature and below the dew point, it turns into frost.


Describe how frost forms?

Frost is the solid deposition of water vapor from saturated air. It is formed when solid surfaces are cooled to below the dew point of the adjacent air as well as below the freezing point of water.[1] Frost crystals' size differ depending on time and water vapour available. Frost is also usually translucent in appearance. There are many types of frost, such as radiation and window frost. Frost causes economic damage when it destroys plants or hanging fruits.


What is white powder on your pond water?

Frost..?


What has the author Sherman L Frost written?

Sherman L. Frost has written: 'Municipal water problems in Ohio' -- subject(s): Water-supply


How does a water spider orchid look?

This might help. go on Google.com, then press images, and then type in water spider orchard.


What is the different between fog and frost?

The main difference is that fog is visible water vapor in the air and frost is water vapor that has made a frozen coating on objects. The expression "there's frost in the air" is a little misleading, what it actually means is that a person can detect the conditions in the air that will be producing frost.


How can frost cause stuctual damage in the winter?

A severe frost freezes water, the water expands as it turns to ice, and widens cracks in rocks and structural damage.


Is frost forming on grass in the morning is a chemical or physical?

Frost is a physical change, the condensation and freezing of water vapor.


What is frozen dew?

Also called Frost is the solid deposition of water vapor from saturated air. It is formed when solid surfaces are cooled to below the dew point of the adjacent air as well as below the freezing point of water. Frost crystals' size differ depending on time and water vapour available. Frost is also usually translucent in appearance. There are many types of frost, such as radiation and window frost. Frost causes economic damage when it destroys plants or hanging fruits.


Do you water after applying ammonium nitrate to lawn?

no


Is water a verb?

He is applying water. Water is a noun. I water my lawn once a week. Water is a verb.