Users Manual for YIELD: Timber-Yield Forecasting and Planning Tool, Version 1.2

摘要

YIELD is an interactive FORTRAN program designed to aid foresters in determining timber management recommendations. YIELD allows the forester to input information, provide direction, and receive answers to specific questions at the computer terminal. The user can preview the simulated effect that various management strategies have on forest growth, yield and financial profitability. Information communicated from the program is useful for evaluating and scheduling timber management activities. YIELD addresses the forest stand (existing or future) as the unit of analysis. Input includes current stand conditions, a harvest schedule and simple financial data. Output consists of concise reports that summarize forecasted volume yield, cash flows, and measures of profitability (i.e., internal rate of return and present net worth). The interactive design enables the forester to see how profitability measures change in response to a changing harvesing schedule or planting density, or with the manipulation of a number of variables. An option is available to perform financial calculations on either a before or after taxation basis. YIELD provides stand level growth, yield, and financial analysis information. (ERA citation 08:021932)