help me science question?

Question

why do citrus farmers spray water on their crops the evening before the temperature is predicted process of freezing?

Answer 1

Since water freezes at 32 F. it acts as an insulation against colder tempretures

Answer 2

It is shown to be at least somewhat successful: "Sprinkling A very low rate of application of water through irrigation can be effective in preventing freeze damage through the release of heat during cooling and freezing. Protection from freezing temperatures as low as -60C have been reported for low growing berry and vine crops, when 1.5 to 2.5 mm per hour of water was applied.

Sprinkling of the crop should begin with the onset of freezing conditions and a film of water continuously maintained until temperatures have risen above the freezing level (0º C). If sprinkling is discontinued prematurely, heat will be drawn from leaves to melt the ice and freeze damage may result. This method creates another problem if the frost lasts too long, because the plants must be able to support the added weight of ice that builds up on the leaves and branches. A forecast of the duration that temperatures are expected to remain below freezing is very useful when using this method.

In spite of the problems, this method has proven effective for low growing crops such as strawberries, tomatoes, beans, cucumbers, peppers and squash as well as vine crops and tree fruits. It is important to recognize that this method only prevents the temperature of the protected plant from falling below the freezing point. It does not warm the plant parts nor does it raise the air temperature appreciably. Moreover, sprinklers need to provide constant, uniform coverage.

There is controversy over the use of irrigation as a protection method prior to frost occurrence. The added moisture has the beneficial effects of increasing the capacity of the soil to store heat and improving conduction of heat to the surface. Nevertheless, heating of the soil during day time is reduced because increased evaporation uses up heat energy. Moisture may also change the critical temperature which is needed to cause freeze damage to a crop. Since there are counteracting factors, a general recommendation cannot be made."

Answer 3

The water requires more energy for the fruit to reach freezing .

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Answer 4

because they feel like it and it makes the citric more citrisier.

Answer 5

dont really know