Certified Crop Advisor Practice Exam

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If the base temperature is 60 degrees and the daily temperature is 80 and the maximum temperature is 95, how many heat units have accumulated?

The correct answer is: 20

To calculate the heat units accumulated, you first need to understand how to determine the cumulative heat above the base temperature. The formula to calculate heat units is: Heat units = (Daily temperature - Base temperature) In this scenario, the base temperature is 60 degrees. The daily temperature is 80 degrees. Therefore, the calculation would be: Heat units = (80 - 60) = 20 heat units. This means that throughout the day, the temperature exceeded the base temperature by 20 degrees, resulting in the accumulation of 20 heat units. The maximum temperature of 95 degrees is not necessary for the calculation of accumulated heat units for this specific daily temperature, as the daily temperature is what contributes to the overall heat accumulation towards plant development. Thus, the total heat units accumulated, given the base temperature and daily temperature, is indeed 20 heat units.