Crops differ in the number of heat units required to mature them. Heat units are usually computed by summation of degree-days for a growing season. A degree day is the:

Question

a) the maximum temperature above a specific threshold
b) the minimum temperature above a specific threshold
c) number of degrees above an established minimum growing temperature
d) number of degrees above an established maximum growing temperature
e) all of the above
f) none of the above

Answer 1

The correct answer is: c) number of degrees above an established minimum growing temperature.

Degree days are calculated as the number of degrees that the average daily temperature exceeds a defined base temperature (minimum growing temperature) relevant to the crop being measured.