What is the MAI of the stand at year 100?

• A. 1.25 cords/year
• B. 0.75 cords/year
• C. 2.0 cords/year
• D. 1.0 cords/year

Answer: (A)

MAI is the average annual volume produced up to a given age. It’s calculated by dividing the total volume harvested by that age by the number of years.

So at year 100, MAI = total volume by year 100 ÷ 100. If the stand has produced 125 cords by year 100, the MAI would be 1.25 cords per year. That shows why a value of 1.25 cords/year fits. The other options would correspond to different cumulative volumes (75 cords → 0.75, 200 cords → 2.0, 100 cords → 1.0). Remember MAI reflects cumulative production over the period, not the current year’s growth rate.