In the MAI formula MAI = Ya / a, what does a represent?

In the MAI formula MAI = Ya / a, what does a represent?

• A. Ya.
• B. Growth rate.
• C. Height.
• D. Age.

Answer: (D)

The main idea here is understanding what the denominator in the MAI formula represents. MAI, or mean annual increment, is defined as the total yield up to age a (Ya) divided by the age (a) in years. So the variable in the denominator is the age of the stand or tree, not the yield, growth rate, or height. Dividing the cumulative yield by its age gives the average amount produced per year over the lifetime up to that point, which helps assess how production changes as the stand develops.

The main idea here is understanding what the denominator in the MAI formula represents. MAI, or mean annual increment, is defined as the total yield up to age a (Ya) divided by the age (a) in years. So the variable in the denominator is the age of the stand or tree, not the yield, growth rate, or height. Dividing the cumulative yield by its age gives the average amount produced per year over the lifetime up to that point, which helps assess how production changes as the stand develops.