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If frost warning is given which process does a farmer try to reduce by covering crops?

Answer and explanation

Correct answer: Excessive radiational heat loss from surface

Correct answer: A. On clear, calm nights, crop surfaces can lose heat by emitting terrestrial radiation. If the surface temperature falls to or below freezing, water on or within plant tissues may freeze and frost injury can occur. A covering acts as a protective barrier and can reduce direct radiational cooling; it may also help retain a slightly warmer layer of air around the plant. B, soil salinity, is a chemical soil condition and is not the immediate cause of frost. C and D concern erosion and ocean tides, which are unrelated here. The key chain is: radiation loss, surface cooling, freezing risk; covering reduces the first step.

Related tags

Frost ProtectionCrop CoverRadiational CoolingHeat LossForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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