The temperature of the soil is strongly influenced by solar radiation. At what depth within the soil would you expect to find the smallest annual variation in temperature?
A) 1 centimeter
B) 2 centimeters
C) 5 centimeters
D) 10 centimeters

Question

Quizplus · Accepted Answer

The depth at which the smallest annual variation in temperature occurs is known as the annual temperature range. This range decreases with depth as the thermal conductivity of soil becomes more important in influencing temperature changes. At a depth of 10 centimeters, soil temperature is usually buffered against daily and seasonal temperature changes, resulting in the smallest annual temperature variation.

The Temperature of the Soil Is Strongly Influenced by Solar