Forest Biometrics exam 1 Questions and Answers 100% Pass

Forest Biometrics exam 1 Questions and Answers 100% Pass This course will concentrate on two areas: - Sampling and Estimation Growth and Yield Sampling is - a method or process that allows an estimation to be generated to describe a population why dont we measure all the trees in an area? - Measuring an entire population is time consuming and in most cases cost prohibitive Sampling, if done correctly, can provide a - cost effective and accurate method for effective decision making for natural resource managers there is a direct correlation between costs and - information quality To determine the quality of sampling and estimation we will use - statistics for validation 2 100% Pass Guarantee Katelyn Whitman, All Rights For a forester, the sampling and estimation process is called - forest inventory 2 most common reasons to do a forest inventory - gather info for -management -timber sales The intensity of a forest inventory results in an estimation of the - - whats out there -how much is out there -where is it the higher the intensity of an inventory, the greater the - accuracy Inventory Objectives can include - Volume or value or both of timber in a defined spatial extent Number of deer per spatial unit Habitat quality for a wildlife species Occurrences of other species (vegetative or animal) 3 100% Pass Guarantee Katelyn Whitman, All Rights Fuel Load Modeling Road characteristics and integrity Soil analysis Two types of Sampling: - Subjective and Probability subjective sampling - can be implemented with or without preconceived bias what does biased sampling mean - conscious avoidance of forest stand nonconformities i.e. only pick plots that seem to represent the entire stand that can leave out nonaverage characteristics what does non-biased sampling mean - inclusion of forest conditions that include areas considered extremes (min/max) of the population i.e. small/large DBH Subjective sampling Can be justified when: - • Extreme high cost of sampling and large variations between sample variables i.e. inaccessible spatial extents with large ranges for DBH and # Trees 4 100% Pass Guarantee Katelyn Whitman, All Rights • Estimations are time sensitive and decisions are not related to bias estimates • Low funding to complete inventory • Precision estimates are not needed • Results are not going to be contested probabilty sampling - covers sampling techniques needed to serve multiple decisions for the long term and where statistical validation is needed what is the preferred sampling method? - probability Two levels of numerical results: - computat