Suppose peas are planted in Indiana on May 1. If the peas need 1200 growing degree-days before they can be picked, and if the mean temperature for each day during May and June is 70°F, in about how many days will the peas be ready to pick? (Assume a base temperature of 40°F.)

Question

Quizplus · Accepted Answer

To calculate the growing degree-days, we need to subtract the base temperature of 40°F from the mean daily temperature and sum all the values for the days between May 1 and June 30.

Mean daily temperature = 70°F
Base temperature = 40°F

Growing degree-days = Σ(mean daily temperature - base temperature) for May and June

= (70-40) + (70-40) + ... (70-40) for 61 days

= 1860 degree-days

Therefore, the peas will be ready to pick in 1860/1200 = 1.55 times the number of days it takes to accumulate 1200 degree-days.

Total days = 61 x 1.55 = 94.55

Hence, the best answer is C) 40 days.

Suppose Peas Are Planted in Indiana on May 1