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Why can frost be more harmful than dew in agriculture?

Answer and explanation

Correct answer: Because ice crystals can damage tender plant cells

Direct answer: A is correct. Dew is liquid water deposited on a relatively cool surface, whereas frost forms when water freezes as ice crystals on a surface or when freezing conditions produce frozen deposits. Ice formation can injure tender plant tissues. When water freezes in or around plant cells, the physical changes and dehydration associated with freezing may rupture or damage delicate cell structures. This is why frost can harm seedlings, leaves, blossoms, and other vulnerable crop parts, although the degree of damage depends on crop type, temperature, duration, and growth stage. A identifies the relevant mechanism. B is wrong because frost is not reliably a beneficial source of extra water and freezing itself is the danger. C is wrong because dew is liquid moisture. D is wrong because frost is associated with sufficiently cold conditions, not only summer. Memory cue: dew is liquid and usually mild; frost is frozen and can injure tissue.

Related tags

FrostDewAgricultureCrop DamageForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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