Simulation and comparison of silvicultural alternatives for even-aged Pinus pinaster Ait stands in Galicia (Northwestern Spain)

Three silvicultural alternatives for pure, even-aged stands of maritime pine (Pinus pinaster Ait) grown in Galicia (Northwestern Spain) are simulated and compared. First, each silvicultural alternative is described by a specific combination of initial stand-density, pre-commercial treatment, thinning pattern, and rotation age. The development of each silvicultural alternative is simulated using a regional growth and yield projection system based on a dynamic stand growth simulator and a size class model for representative trees. Different timber grades associated with each alternative are predicted and estimates of costs and selling prices are used to predict a cash flow pattern for each of the simulated alternatives. Finally, the alternatives are ranked using the criteria net present value of an infinite series of like rotations and internal rate of return. For the present market conditions, the most intensive silvicultural alternative is the most desirable one if profit maximization is the objective of forest management.