Which statement best describes the use of MAI in harvest planning?

Which statement best describes the use of MAI in harvest planning?

• A. MAI predicts total plot area.
• B. MAI determines fertilizer application rates.
• C. MAI measures bark thickness.
• D. MAI helps identify the optimal harvest age to maximize yield.

Answer: (D)

Mean Annual Increment represents the average amount of wood produced per year for a stand, found by dividing stand volume by its age. In harvest planning, you look for the age at which this average annual growth is greatest, because harvesting at that age yields the largest sustainable yield per year over a rotation. When MAI reaches its maximum, the stand is producing wood most efficiently on a yearly basis, so it’s the best target for harvest to maximize yield. MAI isn’t about predicting total plot area, setting fertilizer rates, or measuring bark thickness—those involve other measurements or models.

Mean Annual Increment represents the average amount of wood produced per year for a stand, found by dividing stand volume by its age. In harvest planning, you look for the age at which this average annual growth is greatest, because harvesting at that age yields the largest sustainable yield per year over a rotation. When MAI reaches its maximum, the stand is producing wood most efficiently on a yearly basis, so it’s the best target for harvest to maximize yield. MAI isn’t about predicting total plot area, setting fertilizer rates, or measuring bark thickness—those involve other measurements or models.