Rpf Exam Short Answer Study Guide

What is a hypsometer? Give two examples of hypsometers commonly used by foresters. {Ans: Instrument that measures height; could use a laser or clinometer}You wish to thin a stand of trees to an average 24' by 24' square spacing. How many TPA on the average acre? {Ans: 1 acre = 43560 feet 24*24 = 576 43560/576 = 76 TPA}Differentiate between current annual increment and mean annual increment for a given tree. {Ans: CAI = amount of growth over the past year MAI = amount of growth averaged over the life of the tree}The cable logging, define the term tightlining {Ans: A method of high lead yarding in which the haul back line supports the butt rigging and makes it possible to lift the butt rigging and its load over obstacles}What is the 'coefficient of variation' used to measure? {Ans: This measures the dispersion of data points around a mean (ratio of standard deviation to the mean): standard deviation/expected value; used to measure variation in comparing populations}List four characteristics of a headwaters stream (Strahler orders 1 through 3) {Ans: - High gradient - Low pool # and volume - Smaller size stream than Strahler orders