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Crop Protection Worksheet
1. In Florida, frost will form on a night when the air temperature is just above freezing, but only on a very clear night. It is very rare to see frost on the ground in Florida on a cloudy night. Using the guide's information and the knowledge from the chapter, explain why frost can form on a night when the thermometer on my porch reaches a low reading of 33º F - above the freezing temperature.
2. If you drive by a pasture on a frosty morning, you will notice that frost forms only on the ground in open areas. There is no frost under trees, even single trees that stand alone. Explain why this is so using concepts from the chapter and the guide.
3. The section on Active Methods (part 1) discusses the advantages of covering plants. Discuss how this method works using the terms for methods of heat transfer.
4. The section on Active Methods (part 4) discusses 'sprinkling' - spraying water on plants to protect them. This technique is very popular in Florida Explain in own words, using concepts and terms from the chapter, exactly how spraying fruit with water on a freezing night protects the fruit from damage.
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