Calculate and graph the MAI and the CAI for the two species below from 0 to 200 years in excel. (Attach excel sheets for full credit.)

1. Ponderosa pine, a = 10, b = 1, c = -0.005.

2. Loblolly pine, a = 2, b = 2.8, c = - 0.018

. 3) Verify your answer by hand mathematically for species a and b above. (5 points)

HINT: Two ways to solve - Optimum occurs at maximum MAI. Or where MAI = CAI, which can be . = 0. / 0/ rewritten as:

4) If you account for non-timber values that increase with forest age, will you harvest sooner or later than you found above, and why? Illustrate with a graph. (5 points)