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  2. Soil thermal properties - Wikipedia

    en.wikipedia.org/wiki/Soil_thermal_properties

    The single probe method employs a heat source inserted into the soil whereby heat energy is applied continuously at a given rate. The thermal properties of the soil can be determined by analysing the temperature response adjacent to the heat source via a thermal sensor. This method reflects the rate at which heat is conducted away from the probe.

  3. How to measure heat correctly, according to scientists, and ...

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    In the sun, in the shade, on a rock, in a glade. For every different way there is to experience heat — in the sun, in the shade, on a rock, in a glade — there is a scientific debate about how ...

  4. Growing degree-day - Wikipedia

    en.wikipedia.org/wiki/Growing_degree-day

    Growing degree days (GDD), also called growing degree units (GDUs), are a heuristic tool in phenology.GDD are a measure of heat accumulation used by horticulturists, gardeners, and farmers to predict plant and animal development rates such as the date that a flower will bloom, an insect will emerge from dormancy, or a crop will reach maturity.

  5. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    The specific heat of soil increases as water content increases, since the heat capacity of water is greater than that of dry soil. [89] The specific heat of pure water is ~ 1 calorie per gram, the specific heat of dry soil is ~ 0.2 calories per gram, hence, the specific heat of wet soil is ~ 0.2 to 1 calories per gram (0.8 to 4.2 kJ per ...

  6. What is the heat index? Explaining how it’s calculated and ...

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  7. What is the heat index? How humidity and the dew point can ...

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    The heat index explains why humidity makes a difference. Have you ever checked the temperature and noticed that it "feels" several degrees hotter? The heat index explains why humidity makes a ...

  8. Heat index - Wikipedia

    en.wikipedia.org/wiki/Heat_index

    The heat index (HI) is an index that combines air temperature and relative humidity, in shaded areas, to posit a human-perceived equivalent temperature, as how hot it would feel if the humidity were some other value in the shade. For example, when the temperature is 32 °C (90 °F) with 70% relative humidity, the heat index is 41 °C (106 °F ...

  9. What does heat index mean and why is it important in ... - AOL

    www.aol.com/does-heat-index-mean-why-145452376.html

    Heat index factors in the relationship between air temperature and relative humidity to illustrate how the temperature feels to the human body. A heat index of 95 degrees, for instance, can be ...

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